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在高一化学教材《卤族元素》一节中[实验4—9]、[实验4—10]两个演示实验在课前需要制备好氯气,课堂上演示时间长,操作烦琐,现象不明显,容易污染教室里的环境,直接影响师生的身体健康,导致影响课堂教学效果。我们对上述实验做了一些改进。
The two demonstration experiments in Experiment 1-9 and Experiment 4-10 in the chemistry textbook “Halogen” in the Chemistry One textbook require chlorine gas to be prepared before the lesson. The demonstration in the classroom is long and cumbersome. The phenomenon is not obvious. It is easy to contaminate the environment in the classroom, directly affect the health of teachers and students, and lead to the impact of classroom teaching. We made some improvements to the above experiment.