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氢氧化钠溶液、氢氧化钙溶液与二氧化碳的反应是碱的重要化学性质,是初中化学的重点内容。二氧化碳与氢氧化钙溶液反应有明显的现象,而与氢氧化钠溶液反应没有明显现象,因此,设计实验探究该反应能否发生备受命题者青睐,已成为中考探究性命题的热点。例某兴趣小组同学将CO_2分别通入澄清石灰水和氢氧化钠溶液中,观察到前者变浑浊,后者无明显现象。
The reaction of sodium hydroxide solution and calcium hydroxide solution with carbon dioxide is an important chemical property of alkali and is the key content of junior high school chemistry. Carbon dioxide and calcium hydroxide solution reaction obvious phenomenon, and the reaction with sodium hydroxide solution no obvious phenomenon, therefore, to design experiments to explore whether the reaction favored by many proponents, has become a hot topic in the exploratory test. Some students from a certain interest group passed CO_2 into the clarified lime water and sodium hydroxide solution, respectively, and the former was found to be turbid. The latter did not show obvious signs.