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为了加深学生对于二氧化氮被水吸收生成硝酸,同时放出一氧化氮的印象,在中学演示二氧化氮被水吸收生成硝酸的实验是有意义的。我们取一支干燥的玻璃管A,(其内径约30毫米、长度约300毫米),两端配上附有导管的单孔橡皮塞,(其中一根导管还附有玻璃活塞,如图1所示),并将管A作气密性检查。
In order to deepen students’ impression that nitrogen dioxide is absorbed by water to produce nitric acid and emit nitric oxide at the same time, it is meaningful to demonstrate that nitrogen dioxide is absorbed by water to generate nitric acid in secondary schools. We took a dry glass tube A (with an inner diameter of about 30 mm and a length of about 300 mm) with a single-hole rubber stopper attached to the ends of the tube (one of the tubes was also accompanied by a glass piston, see Figure 1). Shown), and tube A was checked for airtightness.