化学是一门以实验为基础的自然科学,中学化学教学中不可避免会接触到很多实验,这也更有利于学生对知识的理解和认知。然而,无论是演示实验还是学生实验都存在一些课堂中无法完成的情况,如:一些实验中的反应速率要么太快,要么太慢;一些实验中会产生有害有毒物质;还有一些实验有爆炸、腐蚀等危险隐患;另外,不少化学基本理论知识都比较抽象,如概念、原理的学习,而一般这样的知识都会 Chemistry is a natural science based on experiments. In chemistry teaching in middle school, it is inevitable to encounter many experiments, which is more conducive to students’ understanding and cognition of knowledge. However, both the demonstration experiment and the student experiment have some situations that cannot be accomplished in the classroom. For example, the reaction rate in some experiments is either too fast or too slow; some experiments produce harmful and toxic substances; and some experiments have explosions. , Corrosion and other dangerous hazards; In addition, many basic theoretical knowledge of chemistry are more abstract, such as the study of concepts, principles, and generally such knowledge will