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一、问题来源由于CO_2能溶于水,所以收集CO_2只能用向上排空气法。而向上排空法收集的CO_2不纯,如何收到纯净的CO_2呢?许多教辅资料都“一致”介绍:由于同离子效应的影响,CO_2在饱和NaHCO_3溶液中溶解度较小,可用排饱和NaHCO_3溶液法。我似信非信,决定到实验室亲自动手实验。
First, the source of the problem Because CO_2 can be dissolved in water, so the collection of CO_2 can only be used to row up the air method. And up emptying method collection of CO_2 impure, how to receive pure CO_2? Many teaching materials are “consistent” Introduction: Due to the same ion effect, CO_2 in the saturated solution of NaHCO_3 less soluble, available row Saturated NaHCO_3 solution method. I believe the letter, decided to go to the laboratory hands-on experiment.