实验是化学教学的主要内容,也是学生获取化学知识的重要途径。通过实验学生可以直观地观察现象,分析原因,得出结论,但在高中化学实验教学中,有的化学实验因有害学生健康、容易发生安全事故、实验条件的限制等原因,学生不宜或不能动手进行操作,如果这些实验只凭教师讲述,学生就不能感知实验的过程,没有了亲历的过程,就会影响学生的学习效果。近年来,对不宜或不能进行实 Experiment is the main content of chemistry teaching and also an important way for students to acquire chemical knowledge. Through the experimental students can observe the phenomenon intuitively, analyze the reasons, come to the conclusion, but in high school chemistry experiment teaching, some chemical experiments because of harmful to students health, prone to safety accidents, experimental conditions and other reasons, students should not or can not do it If these experiments are taught only by teachers, students can not perceive the process of experiment. Without the process of witnessing, they will affect the learning effect of students. In recent years, it should not or can not be implemented