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一、实验室制取CO_2气体的方法及原理1.确定气体的发生装置根据反应物的状态和反应条件,气体发生装置可分为两种类型:(1)固体与固体加热制取气体的发生装置,如用高锰酸钾制氧气;(2)固体与液体不加热制取气体的发生装置,如用过氧化氢和二氧化锰制氧气、用大理石和稀盐酸制取二氧化碳等.2.确定气体的收集装置确定气体的收集装置应综合考虑制取气体的密度和溶解性.(1)不易溶于水或难溶于水,且不与水发生反应的气体可用排水法收集,如氧气、氢气等.
First, the laboratory system to obtain CO_2 gas and the principle of 1. Determine the gas generating device According to the reaction state and reaction conditions, gas generating device can be divided into two types: (1) solid and solid heating gas production Devices, such as the use of potassium permanganate oxygen; (2) solid and liquid heating system to obtain gas, such as hydrogen peroxide and manganese dioxide oxygen, marble and dilute hydrochloric acid for carbon dioxide. Determination of gas collection device Gas collection device should take into account the preparation of gas density and solubility (1) difficult to dissolve in water or insoluble in water, and does not react with water gas drainage method available, such as oxygen , Hydrogen and so on.