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高中化学课本甲种本第一册(第54页)对硫化氢性质的演示实验,只有两个燃烧实验过程,我们为了在教学中突出硫化氢的还原性和弱酸成盐性的问题,重新设计了整个演示实验,即将实验分为A、B、C、D四个组的连续实验装置来完成。因为硫化氢是一种有毒气体,这就要求演示实验应在较短的时间内完成,并且实验现象要明显。但课本对制硫化氢所用的酸也未说明应稀释到何种程度,这给演示实验带来了一定的困难。因
There are only two combustion experiments in the demonstration experiment of hydrogen sulfide in the first volume of the high school chemistry textbook A (page 54). We have redesigned the problem of highlighting the reducibility of hydrogen sulfide and salt formation of weak acid in teaching. The entire demonstration experiment, that is, the experiment is divided into A, B, C, D four groups of continuous experimental devices to complete. Because hydrogen sulfide is a toxic gas, it requires that the demonstration experiment should be completed within a short period of time, and the experimental phenomenon should be obvious. However, textbooks did not specify the extent to which the acid used for hydrogen sulfide production should be diluted. This presented certain difficulties for demonstration experiments. because