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初中出现催化剂的时候,学生很难理解为何它不是反应物而是反应条件?教师习惯于直接给出催化剂概念并让学生记住实验室制取氧气的反应原理。站在学生角度如何轻松理解催化剂和反应物的不同,通过与学生一起进行实验探究,使学生豁然开朗,收到意料之外的效果。
When a catalyst is present in junior high school, it is hard for students to understand why it is not a reactant but a reaction condition. Teachers are accustomed to giving a catalyst concept directly and having students remember the laboratory reaction principle of making oxygen. From the students’ point of view, it is easy to understand the difference between catalysts and reactants. By experimenting with students, students can suddenly see and receive unexpected results.