“化学教学”1982年第一期刊登了“二氧化氮溶于水实验”的建议。看后提出如下意见:为证实NO_2和水反应放出1摩尔NO,我使用浓硝酸与铜反应,当大量产生红棕色NO_2气体时,用带塞导管将NO_2导入容量为20毫升的试管中,收集满后,立即将试管倒立在盛有水的水槽里,此时可以清楚观察到NO_2溶于水,水位逐渐上升,红棕色逐渐消去。当水位到 In the first issue of “Chemistry Teaching” in 1982, the “Nitrogen dioxide dissolved in water experiment” was published. After looking at the following observations: To confirm that NO 2 reacts with water to release 1 mole of NO, I use concentrated nitric acid to react with copper. When a large amount of red-brown NO 2 gas is produced, the NO 2 is introduced into a 20-ml test tube with a stoppered tube and collected. When it is full, the test tube is immediately inverted in a water tank filled with water. At this point it can be clearly observed that NO_2 dissolves in water, the water level gradually rises, and the reddish brown gradually disappears. When the water level reaches