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
