Portable Laboratory Kit for Students Self Learning of Factors that Affect Reaction Rates Tuszie Widhiyanti1, a), Jihan Assyifa Fatihah1, , Sri Mulyani1, Wiji Wiji1
Chemistry Education Study Program
Faculty of Mathematics and Science Education
Universitas Pendidikan Indonesia
Abstract
This research aims to develop an intertextual-based laboratory kit with the Predict-observe-explain (POE) model and its implementation to improve students^ mastery of the concept of factors that affect reaction rates. This laboratory kit can be used in schools that have limited laboratories and can be used outside the school environment. This laboratory kit consists of practicum tools and materials which are also equipped with student worksheets and teacher guides for using them with the POE learning syntax. The research method used is a mix method with an embedded experiment model, and a one group pretest-posttest design. This kit was validated by 3 experts. The pretest and posttest were carried out before and after testing the laboratory kit in learning using the POE model with 24 class XI high school participants in the city of Bandung. Then, interviews were conducted with teachers and students to assess their perceptions of the laboratory kit. The results of the pretest-posttest analysis showed a significant increase. There are 9 out of 24 students have a complete understanding of the concept of the effect of structure on reaction rate, 13 of 24 students of the effect of ionization energy on reaction rate, 20 of 24 students of the effect of surface area on reaction rate, 15 out of 24 students of the effect of homogeneous catalyst on the reaction rate, and 18 out of 24 students of the effect of a heterogeneous catalyst on the reaction rate. The results of interviews with teachers and students provide information that learning the concept of factors that affect reaction rates using laboratory equipment is something new, so it motivates students and makes students very challenged at the prediction stage. Therefore, this laboratory kit has the potential to be used as an alternative medium for students to study concepts independently
