一、问题的提出化学是以实验为基础的自然科学。化学教学实践证明,如果一堂化学实验课不成功,学生便会感到很失望,学习的兴趣和积极性也就会大打折扣。而氢气氧气混合爆鸣实验又是初中化学里一个十分重要的实验,实验成功与否,直接关系到刚人化学门的初中学生对化学学习的兴趣能否持续维持。因此,许多教师多年来对该实验进行过诸多改进,但是,他们的改进方法仍存在以下缺点: First, the question put forward Chemistry is based on experimental science. Chemistry teaching practice has proved that if a chemistry experiment class is unsuccessful, students will feel very disappointed, learning interest and enthusiasm will be greatly reduced. Hydrogen and oxygen mixed explosion experiment is a very important experiment in junior middle school chemistry. Whether the experiment is successful or not is directly related to whether the junior high school students’ interest in chemistry learning can be sustained. As a result, many teachers have made many improvements to the experiment over the years, but their methods of improvement still have the following disadvantages: