按照现行人教版高中《化学》第二册中的实验方法做“铜与浓、稀 HNO_3反应”的演示实验时,实验对比效果和尾气吸收效果差,污染环境。针对这些不足,笔者对该实验进行了如下改进:1 实验装置(图1) According to the experimental method of “Platinum with concentrated and dilute HNO_3 reaction” in the experiment method in the current edition of the People’s Education Press “Chemistry”, the experimental comparison effect and tail gas absorption effect are poor and pollute the environment. In response to these deficiencies, the author made the following improvements to the experiment: 1 Experimental setup (Figure 1)