一、改进目的该实验是我们开始学习化学时遇到的第一个复杂的探究实验,实验的设计原理和步骤理解起来也比较难。如为什么实验中先夹紧弹簧夹?为什么等冷却后再打开弹簧夹?教师演示时也经常出现点燃红磷时使室内受到污染和结果偏大的情况。为了解决这些问题,特在教材实验的基础上,加以改进。整个实验装置简单,易于操作,安全环保,实验效果好。 First, the purpose of improvement The experiment is the first complex exploration experiment we encountered when we began to learn chemistry, experimental design principles and steps are also more difficult to understand. Why is the experiment first clamping the spring clip? Why cool and then open the spring clip? Teachers often appear when igniting the red phosphorus indoor pollution and the results of the situation is too large. In order to solve these problems, especially on the basis of teaching experiment, to be improved. The experimental device is simple, easy to operate, safety and environmental protection, experimental results.