化学新教材第二册第15页[实验1-7]铜分别与浓硝酸、稀硝酸的反应,是体现硝酸具有强氧化性的一个重要实验,教材采取如图1所示的装置进行操作,我认为有几个地方欠妥。①由于Cu与浓硝酸迅速反应放出NO2气体,因而在系塑料袋的时候和拆洗的过程中都会有NO2气体逸出,从而污染环境,影 The new chemical teaching book Volume 2 Page 15 [Experiment 1-7] The reaction of copper with concentrated nitric acid and dilute nitric acid, respectively, is an important experiment embodying the strong oxidizing ability of nitric acid. The teaching materials are operated using the device shown in Figure 1. I think there are a few places that are bad. 1 Because the rapid reaction of Cu with concentrated nitric acid releases NO2 gas, NO2 gas escapes during the process of the plastic bag and the dismantling process, thus polluting the environment.