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61	Chemistry	ABS-298
Utilization of Wood sawdust as Heavy Metal Adsorbent in the Waste Processing Industry of Paint Yulia Sukmawardani, Pitriani, Pina Pitriana, and Cucu Zenab Subarkah Program Studi Pendidikan Kimia, UIN Sunan Gunung Djati Bandung Abstract This study aims to utilize wood sawdust waste in the paint industry waste treatment. The first thing to do is a qualitative analysis of heavy metals before and after the processing. Furthermore, the parameters measured are temperature, pH, TDS, and dissolved oxygen (Dislove Oxgen). The use of wood sawdust as a heavy metal adsorbent in paint industry wastes is able to provide efficient results with no sediment formation when conducting qualitative analysis of Cu2+ and Cd2+ metal ions and raising the waste parameters to be environmentally friendly. This is indicated by the decrease in TDS, COD, Cu and Cd levels, namely before the adsorption levels were 672 mg / L, 320 mg / L, 2.07 mg / L, and 0.23 mg / L, respectively. After adsorption the levels were 348 mg / L, 120 mg / L, 0.08 mg / L, respectively, and for Cd it was undetectable.This shows that the adsorption process works optimally. Keywords: waste, heavy metals, adsorbent, wood sawdust Share Link | Plain Format | Corresponding Author (Yulia Sukmawardani)

62	Chemistry	ABS-560
Permohonan data Agung Setiawan & Anggana Fitri Satwikasari Universitas Muhammadiyah Jakarta Abstract along with the development of the world of modification in the automotive sector, not only men are interested in modifying, but have begun to be attracted by various levels of society, including women. The enthusiasm of modification lovers makes them compete with each other in pouring creative ideas, so that the need for the automotive center to modify is wider. The need for a large automotive center is due to the increasing number of modification lovers^ activities, the activities of modification lovers at the automotive center are dominated by exhaust gases, noise, and pollution that is not good for people which cause bad effects on the environment. Seeing these problems, it is necessary to research the automotive center building which is ecological in its development. Ecological architecture is the study of designing a building by paying attention to its natural surroundings. In this study, using a descriptive qualitative method that investigates an object by paying attention to its circumstances and problems. After observing the case study of the Honda Wing building, Bangkok. It is observed that the building has applied the principles of ecological architecture, but in its application there are still some that have not been paid attention to. Like the exhaust gas that is directly discharged through the chimney. Keywords: Otomotif, Pusat Otomotif, Arsitektur Ekologis Share Link | Plain Format | Corresponding Author (Agung Setiawan)

63	Chemistry	ABS-156
Utilization of Organic Waste as An Alternative Energy with A Heat Transfer Approach Sri Wuryanti Politeknik Negeri Bandung Abstract Biogas is produced by the anaerobic degradation of organic matter and is mainly composed of methane (CH4). Therefore, the substance is a suitable alternative source of energy. This biofuel may be acquired through waste management, particularly from the processing of household refuse and sewage. Previous research evaluated only the Calorific Value or Higher Heating Value (HHV) of the gas. However, this study aims to analyze heat transfer through the convection of hot gases during combustion. The magnitude of the coefficient of this procedure is highly dependent on the turbulence value. This parameter, in turn, influences the transference rate. Subsequently, a 1558 L capacity bio-digester processed 750 kg mixed household waste, 750 L water, 7 kg Green Phoskko (GP-7), and 50 kg cow dung to generate 75 L of biofuel whose optimum composition was 50.35% CH4, 17.65% N2, 8.98% H2 and 23.02% CO2. Also, the results obtained were juxtaposed with those of two other alkane fuels. The maximum turbulence was determined to be 1100000, 480000, and 290000 while the minimum values were 570000, 270000, and 150000, for butane, heptane, and the best biogas mixture, respectively. Keywords: anaerobic, butane, heptane, methane, turbulence Share Link | Plain Format | Corresponding Author (Sri Wuryanti)

64	Chemistry	ABS-499
THE EFFECT OF LEARNING SCIENCE, ENVIRONMENT, TECHNOLOGY AND SOCIETY (SETS) AND SCIENCE, TECHNOLOGY, ENGINEERING AND MATHEMATICS (STEM) TO CRITICAL THINKING ABILITY IN THE ENVIRONMENT CONCEPT Suci Siti Lathifah, Raden Eka Indra Mulyana, Bibin Rubini Universitas Pakuan Abstract This research is an experimental quantitative research, located at SMAN 3 Bogor with the research time from February to July 2019. The sampling technique was using purposive sampling technique. The research subjects of class X MIPA 3 were given the SETS approach treatment with a total of 37 students and class X MIPA 4 were given the STEM approach treatment with a total of 37 students. This study aims to describe the differences in students critical thinking skills with the SETS and STEM class groups. The average result of the NGain value for the SETS class group was 44, while the STEM value was 29. Based on the t test results at the significant. Based on the results of the research that has been done, it can be concluded that there are differences in students critical thinking skills between groups of students who use the SETS and STEM approaches in environmental material. Students critical thinking skills using the SETS approach are better than the STEM approach. Keywords: SETS Approach, STEM Approach, Critical Thinking Ability. Share Link | Plain Format | Corresponding Author (Suci Lathifah)

65	Chemistry Education	ABS-257
The Development of Electronic Modules (e-Module) for Learning Chemistry on Chemical Safety and Security in High School Laboratories Nazrisya Hairishah(a), Muktiningsih Nurjayadi(a*), Afrizal(a) a) Chemistry Education Program Study, Mathematics and Science Faculty, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun 13220, Jakarta, Indonesia *muktiningsih[at]unj.ac.id Abstract Electronic learning (e-Learning) is a positive impact of technological developments in education. The use of e-Learning is a very helpful in the distance learning process that is being implemented due to the COVID-19 pandemic. Distance learning is being carried out to limit the spread of the COVID-19 virus. One of the applications of e-Learning media that can be used is the electronic module (e-Module). The purpose of this study is to develop electronic modules (e-Module) on chemical safety and security in high school laboratories. This study uses a descriptive quantitative method with the type of research and development by Borg and Gall. The Instrument used in this study is a questionnaire. The e-Module was validated by three experts in media and graphic, and three experts in content and language. The e-Module also were tested by six chemistry teachers, 13 students of 10th grade, and 37 college students of the chemistry education program. The result from the assessment given by experts, teachers, and students from validation and trial stage can be interpreted as well up to be very good. It can be concluded that the e-Module is feasible to be used as a learning media of Chemistry on Chemical Safety and Security in High School Laboratories for high-school students. Keywords: Research and Development of Chemistry Learning- Chemistry Electronic Module- Chemical Safety and Security in High School Laboratories Share Link | Plain Format | Corresponding Author (Nazrisya Hairishah)

66	Chemistry Education	ABS-259
The Development of Chemical Representations Oriented Virtual Laboratory For Electrolysis Practices Sari Sari(a*), Siti Nur Hamidah(b) and Ida Farida(c) (a,b,c) Program Studi Pendidikan Kimia, Jurusan Pendidikan MIPA, Fakultas Tarbiyah dan Keguruan, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. A. H. Nasution No. 105, Bandung, 40614, Indonesia *sari[at]uinsgd.ac.id Abstract This study aimed to describe the development of chemical formula oriented virtual laboratory. It produced a learning media application which could be used in electrolysis practices. The study described the design phase, the development phase, the testing phase and the completion phase of the product. It also analyzed the results of limited tests towards the product. The study showed that the product, a virtual laboratory, features colorful, attractive design and interactivity. The virtual laboratory can be potentially used as a learning media in chemistry learning on electrolysis concepts Keywords: virtual laboratory, chemical formula, electrolysis practices Share Link | Plain Format | Corresponding Author (Sari Sari)

67	Chemistry Education	ABS-4
LEVEL OF STUDENTS^ CRITICAL THINKING SKILLS IN BIOCHEMISTRY: DISCRIMINANT FUNCTION ANALYSIS APPROACH A. Wahyudi(a)*, Liliasari(b), T. Supriyanti(b), Nahadi(b) (a)Department of elementary school education, Alma Ata University, Bantul, Indonesia (b)Department of chemistry education, Indonesia University of Education, Bandung, Indonesia Abstract Keywords: biochemistry- critical thinking skills- discriminant factor analysis Share Link | Plain Format | Corresponding Author (Andi Wahyudi)

68	Chemistry Education	ABS-260
Development of an Electronic Module (E-Module) Chemistry Based on POE (Predict, Observe, Explain) on Reaction Rate Topic Sarifatul Zulfah (a*), Muktiningsih Nurjayadi (b), Zulhipri (b) a) Chemistry Education Program Study, Mathematics and Science Faculty, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun 13220, Jakarta, Indonesia. *sarifatulzulfah14[at]gmail.com b) Chemistry Education Program Study, Mathematics and Science Faculty, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun 13220, Jakarta, Indonesia Abstract The social restrictions that are being implemented due to the COVID-19 pandemic have a profound impact on the field of education, there is an adaptation of changes from conventional to distance learning processes. This study aims to develop Chemistry Electronic Module (e-Module) based on POE (Predict, Observe, Explain) approach on Reaction Rates for 11th grade science students. This module used videos as a stimulus for the student^s learning process into three learning stages, namely predict, observe, and explain. Research and Development type of research by Borg and Gall with the quantitative descriptive methods is used for analysis. The instrument used for this study was a questionnaire. The results from the validation test by three material and language experts as well as media experts show that this e-module is classified as well to be very good for a percentage range of 80-90%. The results of the e-module feasibility test for seven high school chemistry teachers, 18 high-school students of class XI IPA, 40 undergraduate students of Chemistry Education at the State University of Jakarta on the aspects of the developed electronic module were obtained well to excellent interpretations with a percentage range of 81-94%. It can be concluded that the developed electronic module is suitable for use as independent teaching material for students on the Material of Reaction Rate. Keywords: E-Chemistry Module, POE (Predict, Observe, Explain) Approach, Reaction Rates. Share Link | Plain Format | Corresponding Author (Sarifatul Zulfah)

69	Chemistry Education	ABS-261
The Development of Chemitry Electronic Module (E-Module) based on Guided Discovery Learning on Chemical Bonding Larah Maghfirotika (a*), Muktiningsih Nurjayadi (b), Fera Kurniadewi (b) a) Chemistry Education Program Study, Mathematics and Science Faculty, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun 13220, Jakarta, Indonesia. *muktiningsih[at]unj.ac.id Abstract The Covid-19 pandemic that occurred had many impacts, especially in education. The teaching and learning process is currently deliver through distance learning and is carried out on-line through several online platforms and media. This study aims to produce an independent learning media for students who is electronic modules based on the Guided Discovery Learning model on the chemical bonding of class X Senior High School. Media was developed to help student^s learning during the Covid-19 pandemic, which requires students to learn independently with distance learning.This study uses Research and Development by Borg and Gall (2003) and descriptive quantitative method. The instrument that used in this study is questionnaire. The module validated by three experts in content and language, and also three experts in media and graphic. The module also trialed by 20 students of grade 10 science, 35 college students of chemistry education program and 8 chemistry teachers. The ratings that are given by experts, students, and teachers from validation and trial stage can be categorized as good up to very good, so it can be concluded that the module is feasible to be used as a learning media on Chemical Bonding for grade 10 students of Senior High School. Keywords: Chemistry electronic module, guided discovery learning, chemical bonding Share Link | Plain Format | Corresponding Author (Larah Maghfirotika)

70	Chemistry Education	ABS-262
Validity and Reliability Analysis of Multiple Choice Item Evaluation Instrument for Measuring HOTS in The Context of General Chemistry Anis Syafitri(a*), Murniaty Simorangkir (a), Ajat Sudrajat (a) a) Postgraduate Program, Medan State University Jalan Willem Iskandar Pasar V, Medan 20221, Indonesia *syafitrianis[at]gmail.com Abstract Providing valid and reliable items is necessary for the instrument evaluation tool. The instrument which is being used at school is lacked measuring students^ higher-order thinking skills (HOTS). This study examined the validity and reliability of developed multiple-choice item evaluation instruments for measuring HOTS. The instrument test consists of 45 multiple choice items and was developed based on the cognitive domain of Bloom^s Taxonomy. The method was conducted by using a quantitative method which consists of three phases: Content Validity by inter-rater agreement, Construct validity by principal component analysis (PCA), and Reliability shown by Chronbach Alpha. The content validity by inter-rater agreement found that the instrument was categorized as valid. The construct validity by PCA found that each item in the evaluation instrument measured one-dimensionality which good to be used as an evaluation instrument test. The reliability was established to be a high degree with Chronbach Alpha of 0,94. The multiple-choice item was found to be good for measuring HOTS by comparing the outcomes and skills of the students. From the result of this study, a valid and reliable multiple-choice item evaluation instrument has been produced and the items were properly proved to be good for measuring HOTS. Keywords: Evaluation Instrument- HOTS- Validity- Reliability- PCA Share Link | Plain Format | Corresponding Author (Anis Syafitri)

71	Chemistry Education	ABS-523
DIFFERENCES IN IMPROVING LEARNING OUTCOMES USING EDMODO ONLINE LEARNING MEDIA AND NEARPOD ON CHEMICAL LEARNING IN THE NEW NORMAL ERA ADRIANI TRIZKY MAGDALENA, SUMIYATI, LEONY SANGA LAMSARI PURBA Learning activities at SMAN 61 Jakarta are currently following the development of the era 4.0 so that students are familiar with learning media. Where learning is carried out using electronic media. The aim is to see what learning media are good for teachers to use when learning is running so that they can see whether there is an increase in student learning outcomes with Edmodo learning media and nearpod media and an increase in learning outcomes with greater or smaller edmodo media with nearpod media. This type of research used quantitative descriptions. The population of all eleventh grade students at 61 Senior High School Jakarta T.A 2020/2021 with a sample of 72 students using purposive sampling technique, 36 students experiment 1 and 36 students experiment 2. The research instrument used was a test of 18 statement items, the test used in the pretest and posttest was multiple choice with five choices of A-E answers. The results of the trial from the experimental class 1 were the improvement of students ^chemistry learning outcomes with a result of 0.5 where these results included moderate criteria, the results for the experimental class 2 were an increase in the results of students^ chemistry learning with a result of 0.1 where these results were considered low criteria while the test results The requirements for analysis using pretest data indicate that the data is normally distributed and is homogeneous. The difference in improving student learning outcomes using the edmodo and nearpod applications using the paired sample test hypothesis of 0.05 significance obtained results from experimental class 1 and experiment 2, namely the results obtained (Sig. 2-tailed) 0.00 <0.05, that is, there are differences in chemistry learning outcomes using Edmodo learning media and nearpod learning media Abstract Abstract is submitted as file Keywords: chemistry, edmodo, nearpod, online learning, learning outcomes Share Link | Plain Format | Corresponding Author (Leony Sanga Lamsari Purba)

72	Chemistry Education	ABS-268
DISSEMINATION OF DIAGNOSTIC THREE TIER MULTIPLE CHOICE TEST INSTRUMENTS FOR MISCONCEPTIONS ANALYSIS OF MACROSCOPIC, SUB-MICROSCOPIC, AND SYMBOLIC STUDENTS IN CHEMICAL LEARNING Endang Susilaningsih, Nurkintan Aprilia Department of Chemistry Education, Faculty of Mathematic and Natural Science, Universitas Negeri Semarang Abstract Chemical are abstract, to understanding chemical concepts requires visualization and explanation through stratified levels, starts from definition macroscopic, macroscopic, sub-macroscopic, and symbolic. This study aims to analyze sub-microscopic, macroscopic, and symbolic misconceptions in chemistry learning. This research method use 4D model (R&D) is the final part, namely the Dissemination stage. Three Tier Multiple Choice Test Diagnostic consisting of Tier (1): 20 multiple choice questions with one correct answer choice. Tier (2) reasons why choose the answer at tier (1), and Tier (3) level of confidence. This tested product is used for student tests in three different schools (SMAN, MAN and SMKN). Test result data were analyzed, interpreted and expressed in the misconception profile at the macroscopic, sub-microscopic, and symbolic levels. The subjects of were class X students from three different schools. The results of this study showed that the average level of misconceptions at the macroscopic, sub-microscopic, and symbolic levels of high school students was 13%- 40%- and 43%, MAN students 30%- 37%- and 50%, SMKN students 3%- 37%- and 53%. The conclusion of this study, the biggest misconceptions at the symbolic level occurred in the three different schools, and each pattern was decreased in the sub-microscopic and macroscopic misconceptions. Keywords: Diagnostic Test, Macroscopic, Misconception, Sub-microscopic, and Symbolic. Share Link | Plain Format | Corresponding Author (Endang Susilaningsih)

73	Chemistry Education	ABS-528
Online Learning on Acid-Base Titration Materials with Virtual Laboratory a Case Study Hani Cahya Maulani, Sri Mulyani, Tuszie Widhiyanti Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia Abstract This study aims to determine the description of online learning on acid-base titration material using a virtual lab. This research is a case study conducted in a high school in Bandung Barat class XI MIPA 6 with a total of 35 students. This study is to describe students^ understanding of acid-base titration material through a virtual lab. The instruments used were data collection in the form of an assignment regarding the acid-base titration material and a questionnaire regarding the understanding of acid-base titration through a virtual lab. The results of the study describe the results of the assignment that collected as much as 65% and the understanding of the acid-base titration material through the virtual lab is 46.7%. Keywords: online learning, virtual lab, acid base titration Share Link | Plain Format | Corresponding Author (Hani Cahya Maulani)

74	Chemistry Education	ABS-19
Determination of chemical equilibrium constant of thiocyanatoiron(iii) ion complex using a colorimetric analysis of smartphone-captured images as an alternative method for high school chemistry Saksri Supasorn(a*), Purim Jarujamrus(a), Karntarat Wuttisela(a) a) Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Warin Chamrap, Ubon Ratchathani, 34190, Thailand * saksri.supasorn[at]gmail.com Abstract This study is aimed to develop an alternative method for determination of the chemical equilibrium constant (K_{c}) of thiocyanatoiron(III) ion complex based on colorimetric analysis of smartphone-captured images. The various images of the ion complex captured by iPhone 6S plus and Xiaomi Redmi 8 smartphones were processed using ImageJ software in order to determine the K_{c} using a standard plot between blue color intensity and -log[Fe(SCN)]^{2+} It was found that the K_{c} were 212.007±23.95. The Kc obtained from the standard UV-Visible spectrophotometry was 218.382±6.85. The paired samples t-test analysis at the 95% significance level (p<0.05) indicated that the Kc obtained from both smartphones and the standard method were not statistically different. This experiment was implemented as an experiment for one classroom of grade-11 students at a regular public school in Thailand. The students worked in groups of 5 students and spent two hours to complete the experiment. Their determined K_{c} were in the range of 200 - 250, which consistent with our preparation result. It was found that the students obtained post-achievement test score (mean 8.43, S.D. 0.90) statistically higher than pre-achievement test score (mean 4.43, S.D. 0.97) at the 95% significance level (p<0.05). These students commented that this experiment was easy to perform and they enjoyed using their smartphone in studying chemistry. Keywords: chemical equilibrium constant- colorimetric analysis- high school chemistry- smartphone-assisted experiment Share Link | Plain Format | Corresponding Author (Saksri Supasorn)

75	Chemistry Education	ABS-534
Level analysis of scientific argumentation based on student chemical representation in the case of metal reactions Andi Malik Hakim(a), Riri Aisyah(a*), Cucu Zenab Subarkah(a) a) Departmen of Chemistry Education, UIN Sunan Gunung Djati Jl. A.H. Nasution No. 105, Bandung 40614, Indonesia *ririaisyah[at]uinsgd.ac.id Abstract The phenomenon of metal reactions can be studied in chemical learning using scientific arguments based on chemical representations (SACR). This chemical learning innovation aims to analysis students^ scientific arguments based on chemical representation level in conceptual understanding. The subject of this research is the second level students of chemistry education which are arranged based on achievement groups. The instrument used was a question sheet for SACR. The method used is a modification of the quality level of Toulmin^s Argument Pattern (TAP). The results found that student^s SACR level were at level 3, namely scientific arguments, chemical representation were weak, and conceptual understanding were was high misconceptions category Keywords: Level analysis of scientific argumentation- chemical representation- metal reactions Share Link | Plain Format | Corresponding Author (Riri Aisyah)

76	Chemistry Education	ABS-285
Development of interactive textbooks based on blended learning to improve students scientific literacy during the Covid-19 pandemic Muhammad Shohibul Ihsan (a*), Siti Wardatul Jannah (b), Agil Al Idrus (c), Saprizal Hadisaputra a) Biology Study Program, University of Nahdlatul Wathan Mataram, Lombok, Indonesia *ihsan[at]unwmataram.ac.id b) Biology Education Study Program, University of Nahdlatul Wathan Mataram, Lombok, Indonesia c) Biology Education Study Program, University of Mataram, Indonesia d) Chemistry Education Study Program, University of Mataram, Indonesia Abstract This research is a development research that aims to develop an interactive textbook based on blended learning that is feasible, practical and effective to improve students^ scientific literacy during the Covid-19 pandemic. The development model used is the ADDIE (Analysis, Design, Development, Implementation and Evaluation) model. Interactive textbook testing and scientific literacy tests were carried out on class X students at a high school in East Lombok-NTB. The trial design of this study used the One Group Pre-test-Post-test Design. The results showed that blended learning-based interactive textbooks obtained an average score of 81%, scientific literacy instruments 76%, syllabus 84%, RPP 81%. The results of the development of interactive textbooks that have been implemented in chemistry learning have an effect in the form of increasing students^ scientific literacy on oxidation reduction reaction material by 68.3% with a high category. These results indicate that the developed blended learning-based interactive textbook has valid, practical and effective criteria to improve students^ scientific literacy during the Covid-19 Keywords: development- blended learning- scientific literacy- Covid-19 Share Link | Plain Format | Corresponding Author (Muhammad Shohibul Ihsan)

77	Chemistry Education	ABS-32
Feasibility Analysis of STEM-Oriented RADEC Learning Designs to Build Collaboration Skills for Class XI High School Students in Determining pH Routes from Natural Indicators Dini Intania Sari (a*), Wawan Wahyu (b), Wahyu Sopandi (b) Chemical Education Postgraduate Students, Indonesia University of Education, Bandung, 40154, Indonesia Abstract This study aimed to examine the feasibility of a STEM-oriented RADEC learning design to build collaboration skills of Class XI high school students in determining the pH route from several natural indicators. The ability to collaborate is one of the important competencies of the 21st century so that teachers in the field must be able to develop these skills in students so that they can work together in groups. The method used is descriptive research. Participants in this study were several students of class XI IPA at SMAN 2 Ujungbatu. The feasibility test of the learning design consisted of an internal feasibility test by two expert lecturers, one senior teacher, and an external feasibility test for five students of class XI. The results showed that the learning design using the STEM-oriented RADEC Model was able to improve students^ collaboration skills in completing the given task. From this research it can be concluded that the STEM-oriented RADEC learning design can be used to build student collaboration skills. Keywords: Learning Design, Collaboration skills, RADEC Model, STEM Share Link | Plain Format | Corresponding Author (DINI INTANIA SARI)

78	Chemistry Education	ABS-288
Teacher-students perception towards common representation in chemical-science learning and conceptual understanding on additive and addictive substances Ardi Wiyantara(a*) a) Program Studi Magister Pendidikan IPA, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia *ardiwiyantara[at]upi.edu Abstract This study aims to identify teacher-students perception towards common representation in chemical-science learning and conceptual understanding on additive and addictive substances. This is descriptive research. Data were collected through questionnaire, interview, and conception test. Subjects in this study were 8th grades student in one of Junior High School in Bandung. The results of the study show that representations most often used by the teacher are verbal and pictorial representations. The teacher^s view is that pictorial representation is the easiest form of representation to understand by students. However, it is students view that verbal representation is easiest to be understood. The difficulties faced by students in learning science include memorizing a mathematical equation in physics-science, latin name in biology-science, difficulty understanding and disliking science lessons. The average understanding of students^ concepts in the latest subject matter, additives and addictive substances, consisted of 21.4% understanding concepts, 33.7% misconceptions and 44.9% did not understand concepts. Keywords: Additive and addictive substances- Diagnostic conception- Representation Share Link | Plain Format | Corresponding Author (Ardi Wiyantara)

79	Chemistry Education	ABS-289
Heuristic Writing Science Worksheet on Analysis of Chromium Content in fish and water at Cisangkuy River Yulia Sukmawardani, Mia Amelia Rahmawati, Lella Nurlaela, and Neneng Windayani Program Studi Pendidikan Kimia, UIN Sunan Gunung Djati Bandung Abstract The study in this research is based on the needed for alternative student worksheets of analytical chemistry course on the concept of anion reactions. This research aims to create a student worksheet based SWH (Science Writing Heuristic), determine the feasibility of SWH worksheet, and to describe the characterization results of chromium metal content in fish and water in Cisangkuy river using AAS. SWH worksheet are created by using research Development method. Instruments used in this study include the feasibility test format of student worksheets, questionnaire feasibility test student worksheet, and assessment tools of student worksheets. The validation test result based on SWH student format on chromium metal content analysis in fish and wate in Cisangkuy River has been validated with the average value of rcount obtained at 0.83 and the average feasibility of presentation is 83%, while the concentration of chromium metal content in fish in Cisangkuy river using AAS is 0.0691 mg / L, in the water is 0.2205 mg / L for sample 1 and 0.4871 for sample 2. The concentration is still below the threshold established by Government Regulation of the Republic of Indonesia Number 82 of 2001, the maximum allowable level for chromium metal (Cr) is 0.5 mg / L Keywords: Fish- SWH worksheet- chromium- Cisangkuy river- AAS Share Link | Plain Format | Corresponding Author (Yulia Sukmawardani)

80	Chemistry Education	ABS-562
Identifying Chemistry Self-Concept Through the Culturally Responsive Transformative Teaching Yuli Rahmawati, Sabila Izzati, Achmad Ridwan, Rahma Esi Andina Universitas Negeri Jakarta Abstract This study sought to analyze students^ self-concepts in organic chemistry learning through the Culturally Responsive Transformative Teaching model, which consists of five steps: 1) identification, 2) cultural understanding, 3) collaboration, 4) critical reflection, and 5) construction transformation. This qualitative study was compiled using data from interviews, classroom observations, reflective journals, and an assessment instrument known as the chemistry self-concept inventory, which consists five categories: chemistry self-concept, mathematical self-concept, academic self-concept, academic enjoyment self-concept, and creativity self-concept. The study was conducted in a private high school in Bogor, Indonesia, with 42 students in grade 12. The results of the chemistry self-concept inventory test showed a various self-concept. Students who have a good self-concept in learning chemistry can show better abilities in understanding the concepts. One of the learning models that can be used to help students is the Culturally Responsive Transformative Teaching (CRTT) model. Based on the research results obtained, the understanding of self-concepts and the integration of the CRTT model can help shape the positive attitudes possessed by students Keywords: Chemistry Self Concept, Culturally Responsive Transformative Teaching, Chemistry Learning Share Link | Plain Format | Corresponding Author (Yuli Rahmawati)

81	Chemistry Education	ABS-563
Integrating Dilemma Stories and STEAM Projects in Petroleum Topic for Problem-Solving Skills Development Yuli Rahmawati, Novita Veronica, and Erdawati Universitas Negeri Jakarta Abstract This research focuses on the development of problem-solving skills by integrating dilemma stories with Science, Technology, Engineering, Art and Mathematics (STEAM). The problem-solving skills as a set of abilities that students need to develop in facing the future challenge, especially to solve problems in their daily lives. This approach uses a dilemma story to understand chemistry concepts, followed by a STEAM project based on alternative fuel to find a solution to the problem presented in the story. The study was conducted in a secondary school on the topic of petroleum in year 11. A qualitative methodology was employed to explore students^ learning experiences and understanding of the research context. Data was collected through interviews, observations, reflective journals, and chemistry problem-solving tests. The theme of problem-solving skills was explored through data analysis. The results show that integrating dilemma stories to STEAM projects can encourage students to developed problem-solving skills in understanding the problem, strategizing, solving the problem, and evaluating the outcomes. The researchers faced the challenge of integrating a suitable chemistry-based dilemma story with a STEAM project while empowering students and managing time resources Keywords: Dilemma Stories, STEAM Projects,Petroleum Topic,Problem-Solving Skills Development, chemistry Learning Share Link | Plain Format | Corresponding Author (Yuli Rahmawati)

82	Chemistry Education	ABS-56
ENHANCING STUDENTS CONCEPTUAL UNDERSTANDING OF CHEMISTRY IN A SIMAYANG LEARNING ENVIRONMENT Indah Langitasari (a*), Ratna Sari Siti Aisyah (b), Rr. Nareswarizetkasyah Parmandhana (c), and Euis Nursaadah (d) a,b,c) Chemistry education department, Universitas Sultan Ageng Tirtayasa, Jalan Ciwaru Raya No.25 Kec. Cipocok Kota Serang Banten, Indonesia *indahlangitasari[at]untirta.ac.id d) Science education department, Universitas Bengkulu Jln WR. Supratman Kandang Limun Bengkulu Abstract Students^ conceptual understanding of chemistry needs to be supported by the skill to think at three levels of representation. Many students have difficulty understanding the concept of chemistry because of the low skill to think at the three levels of representation. Chemistry learning needs to provide a learning environment that involves chemical representations to facilitate students^ interconnection skills of three levels of representation and ultimately improve students^ conceptual understanding. SiMaYang learning was designed by integrating chemical representation during the learning process. This study aimed to enhance students^ conceptual understanding of chemistry through the implementation of SiMaYang learning. A descriptive quantitative research method with One Group Pretest-Posttest Design is used in this study. Students^ conceptual understanding was measured using three sets of essay tests containing macroscopic, symbolic, and submicroscopic tests for the topic of the buffer concept. The research data were analyzed descriptively and statistically using N-gain and paired sample t-test. The results of the paired sample t-test show the sig value. 0.000 <0.05, which means SiMaYang Learning affects increasing students^ conceptual understanding in chemistry. The finding of this study inform the students^ conceptual understanding of chemistry increased in the medium category (N-gain = 0.62). Keywords: Conceptual understanding, SiMaYang Learning, Multiple representations, Learning environment Share Link | Plain Format | Corresponding Author (Indah Langitasari)

83	Chemistry Education	ABS-62
The Effectiveness Of Inside Durian Rind As A Generator of Electric Energy Based On Drying And Aciding Faisal Khalik A. F. (1), Ferennia Putri (2), Jesica Aprilia Surbakti (3), Thasia Gian Pavita (4), Omay Sumarna (4), Lala Septem Riza (1) 1. Departemen Pendidikan Ilmu Komputer, Universitas Pendidikan Indonesia 2. Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia 3. Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia 4. Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia Abstract Indonesia is worried by running into energy crisis in the next 30 years. That matter would happen if fossil energy reserves would run out and there would be no alternative energies that developed as alternate. Therefore, the community and government should collaborate for finding alternative energy sources in order to reduce the impact of energy crisis. One of the efforts that we can do for supporting that matter is utilizing the biomass. The rind of durian can be used as biomass since durian^s rind has potassium, manganese, folic acid that are able to be used for draining anion and cation which can drain electric current. The purpose of this research is knowing the effectiveness of durian^s rind as the producer of electrical energy based on giving acid and drying. The research method that we used is quantitative research method by experiment. The simulation of solution that we did is divide 4 part of the inside part of durian^s rind then give the different variable for each part. The result of the experiment is the inside part of durian^s rind which had been given the acid without drying has the highest voltage, while durian^s rind which had not been given the acid and with drying after 7 days has the lowest voltage. Therefore, we can conclude that the drying and giving the acid can affect the voltage of electrolyte. Keywords: the rind of durian, electrolyte, electrical energy, acid, drying Share Link | Plain Format | Corresponding Author (Ferennia Putri)

84	Chemistry Education	ABS-76
Argument Driven Inquiry (ADI) in Chemistry Learning: Enhancing Students Argument Skills and Attitudes toward Chemistry Risa Rahmawati Sunarya(a*), Neng Gustini(b), Cucu Zenab Subarkah(a) and Didah Halimah(a) (a) Chemistry Education Program, Faculty of Tarbiyah and Teacher Training UIN Sunan Gunung Djati Bandung *Email: risarahmawatis[at]uinsgd.ac.id (b) Islamic Mangement Education, Faculty of Tarbiyah and Teacher Training UIN Sunan Gunung Djati Bandung Abstract Argument Driven Inquiry (ADI) model is designed to enhance student engagement in scientific argumentation and investigation design. In this report, ADI instructional model is using in salt hydrolysis topic of chemistry learning. The purpose of this study is to investigate argument skill and attitudes of the students toward chemistry. Data was collected to determine students argument skills and attitude toward chemistry. The attitudes toward chemistry that investigated were honest, responsibility and discipline. Results showed that students have high achievement in argument skill and also in attitudes toward chemistry. Particularly high grade student had a significantly more positive attitude toward chemistry. This shows that the ADI model can improve students argument skill and attitudes toward chemistry. Keywords: Argument Driven Inquiry model, chemistry learning, argument skill, attitudes toward chemistry Share Link | Plain Format | Corresponding Author (Risa Rahmawati Sunarya)

85	Chemistry Education	ABS-85
Can the Chemistry of Rare Earth Elements Enhance Student^s System Thinking? A Qualitative Content Analysis Titen Pinasti (a), Ahmad Mudzakir (a*), Hernani (a) a) Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr.Setiabudhi No. 229, Bandung, 40154, Indonesia *mudzakir.kimia[at]upi.edu Abstract The Chemistry of Rare Earth Elements (REE) is a teaching-learning topic that can integrate the principles of molecular basis of sustainability from economic, society, and environmental aspects. The use of molecular basis of sustainability in the teaching and learning can lead the student toward system thinking. System thinking defines as the ability to interpret a complex systems. This research was conducted to obtain a scientist^s conception of REE in a form of concept map and teaching-learning sequences (TLS). The method used is qualitative content analysis (QCA) with a type of literature analysis. The initial phase is carried out by collecting material (literature) from textbooks, monographs, review articles, and research articles. The instruments used are content analysis formats. The analysis was descriptively and structured in a didactic and pedagogical manner to strengthen student^s system thinking skills. The concepts obtained are compiled in the form of a concept map and TLS. The results showed that the content of REE could be analyzed through an inductive approach. The scientist^s conception is obtained include definition, electronic configuration, properties, abundance, processing, and the applications. The Concept map and TLS illustrate potential intended and unintended consequences of REE. Through QCA, there is evident that system thinking can be strengthened through teaching and learning on the REE topic. Further development of this research hoped that could be used to make teaching material and didactical design. Keywords: chemistry of rare earth elements- system thinking- qualitative content analysis- sustainability- didactical design and teaching materials Share Link | Plain Format | Corresponding Author (Titen Pinasti)

86	Chemistry Education	ABS-86
Green Chemistry and Sustainability Aspects of Ionic Liquids as Bamboo Preservative: a Didactical Content Analysis Study Anita Damayanti (a), Hernani (a*), Ahmad Mudzakir (a) a) Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung, 40154, Indonesia *hernani[at]upi.edu Abstract Bamboo has many benefits- it can be used as construction material and multiple products from household products to industrial applications. Bamboo has low durability and easily attacked by fungi, termites, and pests. One way to overcome the disadvantages of bamboo is by using environmental friendly preservatives, which corresponds to green chemistry and sustainability aspects. Engineering can be done with ionic liquids which can be made as a bamboo preservatives. Ionic liquids are environmental friendly and sustainable. It can be integrated with teaching and learning on the concept of green chemistry and sustainability. This study aims to produce a concept map and teaching-learning sequences (TLS) from scientists^ conceptions related to green chemistry and sustainability on the topic of ionic liquids as a bamboo preservative. The method used in this study is qualitative content analysis (literature analysis type). The research instrument is a content analysis format. The content analysis processes includes: 1) literature collection (textbooks, monographs, review articles, and research articles), 2) descriptive analysis, 3) category selection, 4) material evaluation by didactic aspects. The results of this study are in the form of a concept map and TLS illustrate potential intended and unintended consequences of bamboo. Concept map and TLS that connects the relationship between science (components and characteristics), technology (manufacturing and application processes), and engineering (types and examples of preservatives). The results of this study can be used as a basis for designing of teaching materials and didactical sequences. Keywords: Bamboo- ionic liquids- green chemistry- sustainability- teaching-learning sequences and content analysis Share Link | Plain Format | Corresponding Author (Anita Damayanti)

87	Chemistry Education	ABS-348
Comparative Analysis of Vocational High School Textbooks on Pb-PbSO4 Accumulator Cells with Process Explanation Models Mujahid Imam Muttaqin(a*), Hernani (b), Hendrawan (b) a) Department of Chemistry Education, Indonesia University of Education, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia *mujahidimammuttaqin[at]upi.edu b) Department of Chemistry Education, Indonesian University of Education, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia Abstract This study aims to describe the results of the analysis of the Pb-PbSO4 accumulator cell textbook based on the presentation of the process explanation model. Process explanation is needed by Vocational High School students to support the development of reasoning and argumentation skills in learning. This research is a descriptive qualitative research method by analyzing textbooks. The research instrument is a form of analysis of the subject matter in textbooks, and a form of analysis of material content based on a process explanation model. The analysis was carried out on three Pb-PbSO4 accumulator cell textbooks (Textbooks X, Y, and Z) which were taken based on the results of preliminary research and interviews regarding the use of textbooks in vocational schools in the South Bandung region. Based on the analysis, textbook X and Z refer to the 2013 curriculum, while textbook Y is a training book. The number of subject matter in textbooks X, Y and Z, respectively 22, 17 and 23 of the subject matter. In presenting the material using a process explanation model, textbook X has the largest percentage with a result of 36.4%, while textbook Y is 11.8%, and textbook Z is 30.4%. Keywords: Vocational School Textbook Analysis- Process Explanation- Pb-PbSO4 Accumulator Cells Share Link | Plain Format | Corresponding Author (Mujahid Imam Muttaqin)

88	Chemistry Education	ABS-361
Integrating of socio-scientific issue into predict-observe-explain-extend strategy to facilitate students collaboration skill Antuni Wiyarsi (a), Sekar Dewi Setyaningrum (b) (a) Chemistry Education Department, Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta, Indonesia (b) Study Program of Bachelor of Chemistry Education, Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta, Indonesia Abstract The study aims to examine students^ collaboration skill during the implementation of Predict-Observe-Explain-Extend (POEEd) strategy. The use of socio-scientific issue (SSI) supported the POE strategy that was implemented on Acid Base topic. This research adopted a pre-experimental method. A total of 65 eleventh grade students were enrolled as research sample. They were selected by random sampling. The Collaboration Skill Rubric (CSR) as the instrument in collecting data consist of four aspects that was breakdown into 20 items. Content and construct validity was ensured by a group of expert in chemistry education. Then, five observers engaged for interrater reliability measurement. The CSR had a very good reliability so can be used as data collection tools. Observation toward students^ collaboration skill was done in four meetings with SSI as the starting point of POEEd strategy. The data of students^ collaboration skill was analysed descriptively and by ANOVA test to look the mean different among meetings and aspect of collaboration skill. The result showed that there was no significant different in collaboration skill totally on the fourth implementation of POEEd strategy. However, for the detail analysis indicated that there were significant different of students collaboration skill on commitment and responsibility aspects (95% level of confidence) and for communication aspect at 90% level of confidence. Overall, students had a good collaboration skill and their best performance was gained during discussion about the use of natural indicators of acid base. In this moment, students was challenged to argue and get best solution related to the phenomena of abuse of borax for food. The study suggests that the use of familiar SSI in constructivist strategy improve students^ competence and quality of chemistry learning process. Keywords: Collaboration, inquiry, Sosio-scientific issues, chemistry Share Link | Plain Format | Corresponding Author (Antuni Wiyarsi)

89	Chemistry Education	ABS-362
Conceptions and Troublesome Knowledge on Acid-Base Using the Two-Tier Multiple-Choice Diagnostic Test Septi Ardianti (a)*, Wiji (b), and Tuszie Widhiyanti (b) a) Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia *septi.ardianti[at]upi.edu Abstract Acid-base is one of the materials that tend to be difficult for students to understand. Acid-base is a material that is conceptually solid and requires an integrated understanding of many of the concepts of introductory chemistry. This research is descriptive research that aims to find conceptions of students on acid-base subjects and asking about concepts that are considered troublesome according to their learning experiences. The subjects of this research were 31 students of class XI IPA 4 at SMAN 3 Pariaman. The instruments in this research are diagnostic tests and interviews. The result of this research is the students of SMAN 3 Pariaman have difficulties in learning about the acid-base subject with high category. The percentage of conceptions experienced by students in each indicator is 56.3% of students understand the concept, 20.8% misconception, and 22.9% do not understand the concept. In the second indicator, 45.2% of students understood the concept, 18.3% had misconceptions and 36.5% did not understand the concept. In the 3rd indicator, 35.5% of students understood the concept, 31.2% had misconceptions and 33.3% did not understand the concept. In the 4th indicator, 21.9% of students understand the concept, 27.7% do not understand the concept and 50.3% do not understand the concept. Meanwhile, the acid-base theory, the calculation of pH or pOH, and the relationship between the degree of acidity (pH) and the degree of ionization (a), and the acid equilibrium constant (Ka) or the base equilibrium constant (Kb) are considered troublesome knowledge because they can be conceptually difficult and troublesome language. Keywords: Conceptions- Troublesome Knowledge- Acid-base- Diagnostic test Share Link | Plain Format | Corresponding Author (Septi Ardianti)

90	Chemistry Education	ABS-118
Integrating Molecular Basis of Sustainability to Teaching Learning Sequence of Fire Retardant Bamboo as Sustainable Material: Results from Qualitative Content Analysis Auliya Afifah (a), Hernani (a*), Ahmad Mudzakir (a) a) Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No.229, Bandung, 40154, Indonesia *hernani[at]upi.edu Abstract Bamboo is one of the plants with abundant availability, fast growth rate, natural strength and flexibility that can be used as a sustainable material. Utilization of bamboo has constraints on its nature that is not fire resistant. This obstacle can be overcome at the molecular level through the engineering of fire retardant bamboo using ionic liquids. This molecular engineering can be used to integrate the principle of Molecular Basis of Sustainability in a teaching and learning. This study aims to obtain a concept map and TLS from the conceptions of scientists on the topic of fire retardant bamboo as a sustainable material using ionic liquids. The method used in this study is a qualitative content analysis (literature analysis type). The instruments used include the content analysis format and sustainability aspects. The phase begins with collecting literature (textbooks, monographs, review articles and research articles), conducting descriptive analysis, selecting categories, and ends with evaluating didactically the material. This research produces concept maps, TLS and clarified chemistry concepts. Concept map and TLS can illustrate the relationship between one concept and another so that it will show a causal relationship to the problems and solutions that are offered in a didactic and pedagogical way. The results of the research can be used as a basis for developing teaching materials and didactical design. Keywords: Bamboo, Sustainable Materials, Molecular Basis of Sustainability, Ionic Liquids, Molecular Engineering, Didactics and Pedagogic Share Link | Plain Format | Corresponding Author (Auliya Afifah)

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