<![CDATA[Reaction rate is concept that involves abstract concepts, chemical phenomena, mathematical operations, and practical activities. The characteristics of it require students to have the ability to think scientifically, understand chemical representations, and have good mathematical and practical skills. Based on several research studies, most of the students missed these four abilities, so the concept of reaction rate is considered difficult and affects students' mental models. It is necessary to analyse students' mental models to see the description of students' mental models in understanding chemical concepts. The purpose of this research was to specify the kind and relationships of student’s mental models in understanding the concept of reaction rate.]]>
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