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封闭式气体化学性质实验,主要关键是解决贮气问题,现研制成可以贮存各种气体的钟式多功能塑料贮气罐。它的结构:(图2-A)(1)贮液槽、(2)集气钟罩、(3)安全瓶、(4)集气袋、(5)贮气液(净化液)。贮液槽盛放贮气液,约1200毫升,内有突出的封顶内筒,可以减少贮气液量。钟罩上部装有进、出气导管和阀门;液槽下部设排水阀门,并附设有干燥或计量气泡用的具支试管安全瓶。当充气时,钟罩上升,用气时,钟罩则下降。如果储存氢气、氧气等难溶于水的气体时,储气液可用水封闭;如果储存氨气、二氧化碳等可溶性的气体时,储气液可用水加液态石蜡层封闭,或者用氯化铵(加苛性钠有氨味即可用)、碳酸氢钠等饱和溶液封闭。另外,每个储气罐还配有特制透明塑料袋,可安装在钟罩
The main key to closed gas chemistry experiments is to solve the problem of gas storage, and now it has been developed into a bell-type multifunctional plastic gas tank that can store various gases. Its structure: (Fig. 2-A) (1) Reservoir, (2) Bell jar, (3) Safety bottle, (4) Air collection bag, (5) Gas storage liquid (purification liquid). The liquid storage tank holds approximately 1200 milliliters of gas storage fluid and has a prominent capped inner cylinder, which can reduce the volume of the stored gas. The upper part of the bell jar is equipped with inlet and outlet ducts and valves; the lower part of the tank is provided with a drain valve, and a safety bottle with a test tube for drying or measuring bubbles is attached. When inflated, the bell rises and when it is used, the bell drops. If storing hydrogen, oxygen and other water-insoluble gases, the storage liquid can be closed with water; if ammonia, carbon dioxide and other soluble gases are stored, the storage liquid can be closed with water and liquid paraffin layers, or ammonium chloride ( Add caustic soda with ammonia odor), saturated solution such as sodium bicarbonate closed. In addition, each gas tank is also equipped with a special transparent plastic bag that can be mounted on the bell jar