How to Identify Misconception Using Certainty of Response Index (CRI): A Study Case of Mathematical Chemistry Subject by Experimental Demonstration of Adsorption

The purpose of this study was to identify misconceptions using the certainty response in undergraduate students through a case mathematical chemistry subject by experimental demonstration adsorption. concept conveyed an explanation video. video also directs do practical experiments on data obtained can be used determine isotherm adsorption model that fits with their phenomena. Students analyze understanding concepts have been taught. Misconceptions were analyzed pretest-posttest giving 20 questions followed guess level (CRI). Based answers given, students' being taught identified as concept, lucky guess, not understand and misconceptions. This research reference applied various subjects.