人教版《普通高中化学课程标准(实验)》要求教师学会理解实验,可以根据需要对化学实验进行适当的改进,以更好地补充实验内容。在教材中,因为有一些实验仍存在一些问题,如现象不够明显、内容不够全面、可操作性不强等,所以需要教师去研究探索,不断努力改进演示实验,增强实验效果;不断补充演示实验,让学生更易理解知识,提高学生创新意 PEP version of “ordinary high school chemistry curriculum standards (experiment)” requires teachers to understand the experiment, chemistry experiments can be properly modified as needed to better complement the experimental content. In the teaching materials, because some experiments still have some problems, such as the phenomenon is not obvious enough, the content is not comprehensive enough and the operability is not strong, so we need teachers to research and exploration, and constantly strive to improve the demonstration experiment and enhance the experimental effect; , So that students more easily understand the knowledge and improve students’ innovative ideas