人民教育出版社出版的初三化学教材中共有85个演示实验，这些实验是初中化学教学的重要组成部分。但按教材中的方法去演示，由于实验仪器较小，有些化学反应过程又不十分明显，难以让全部学生观察到全部化学反应过程。为了提高演示实验的效果，我们将其中在反应过程中有颜色改? There are a total of 85 demonstration experiments in the junior chemistry textbook published by the People’s Education Press. These experiments are an important part of junior chemistry teaching. However, according to the teaching method to demonstrate, due to the small experimental instruments, some chemical reaction processes are not very obvious, it is difficult for all students to observe the entire chemical reaction process. In order to improve the effectiveness of the demonstration experiment, we will change the colors in the reaction process.