化学作为一门以实验为基础的自然科学,要实施素质教育、创新教育以及新课程改革教学,实验教学发挥着极其重要的作用。在化学实验教学过程中,无论是教师课堂演示还是学生实验,由于种种原因,有时会出现一些与预料的正常实验结果不相符合的现象,其中有颜色变化的异常,生成物气味的异常,事故发生的异常等等。实验中异常现象的出现,会对学生 As an experiment-based natural science, chemistry plays an extremely important role in implementing quality education, innovation education and teaching reform of new curriculum. In the process of chemical experiment teaching, whether it is a teacher’s classroom demonstration or a student experiment, there are some phenomena that may not accord with expected normal experimental results due to various reasons, such as abnormal color change, abnormal odor of the product, accident Anomalies and so on. The appearance of abnormal phenomena in the experiment, will be for students