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在有硫化氢、二氧化氮、氯化氢等气体产生的实验中,往往由于气体过量或装置气密性差,造成气体外逸。污染环境,危害师生健康,影响实验效果。在教学参考书和教科书中提出的处理方法,设备多,操作烦琐,处理效果不好。例如:高中化学甲种本,二册学生实验二,硝酸和硝酸盐的性质实验中,外逸的二氧化氮提到用塑料袋收集,此法难操作,费时间,塑料袋又易破漏。高中化学甲种本,一册二章一节中,制取氯气和氯气性质实验时,用碱液吸收剩余的氯气,接触面积小,吸收不完全。又如:高中化学甲种本,一册二章二节的实验室制取氯化氢气体时,多余的氯化氢气体用水吸收,为防止倒流,需将漏斗连接在导气
In experiments where hydrogen sulfide, nitrogen dioxide, hydrogen chloride, and other gases are generated, gas escapes often due to excessive gas or poor airtightness of the device. Pollution of the environment, endanger the health of teachers and students, affect the experimental results. The processing methods proposed in the teaching reference books and textbooks have many equipments, are cumbersome to operate, and have poor processing results. For example: high school chemistry, a, two volumes of student experiment II, nitric acid and nitrate properties experiment, the escape of nitrogen dioxide mentioned the collection of plastic bags, this method is difficult to operate, time-consuming, easy to break plastic bags . In the High School Chemistry Handbook, a two-chapter one-part series, when chlorine and chlorine were prepared for the experiment, the remaining chlorine was absorbed by the lye. The contact area was small and the absorption was incomplete. Another example: When a high school chemical type A, a two-and-two-chamber laboratory produces hydrogen chloride gas, excess hydrogen chloride gas is absorbed by water. To prevent backflow, the funnel needs to be connected to the gas.