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按现行高中化学第一册［实验1－7］演示本实验，不但操作麻烦，而且操作过程中有氯气逸出空气中，污染实验环境，布条褪色也较慢。为此，我对本实验作如下改进。1．实验装置实验装置见附图。2．实验步骤（1）取一张有色纸条剪成小长方形，用线吊起并用图钉固定在胶塞下面。实验
According to the current High School Chemistry Book 1 [Experiment 1-7], the experiment was not only troublesome, but also chlorine gas escaped from the air during the operation, and the experimental environment was contaminated, and the discoloration of the cloth was also slow. For this reason, I made the following improvements to this experiment. 1. Experimental device Experimental device See the attached drawing. 2. Experimental procedure (1) Take a colored paper strip and cut it into a small rectangle, lift it with a thread and fix it under the rubber plug with a push pin. experiment