一、发现问题小明学习了碱的化学性质后,知道二氧化碳能与氢氧化钠溶液反应生成碳酸钠和水。但在“探究酸和碱的性质”的实验课上,他向氢氧化钠溶液中通入二氧化碳时并没有看到明显的现象。小明感到非常困惑,究竟该如何证明二氧化碳与氢氧化钠溶液能发生反应呢?二、分组设计实验方案针对小明提出的问题,老师提示说:“对于无明显实验现象的化学反应,可以从证明反应物消失和 First, the problem found Xiao Ming learned the chemical properties of alkali, that carbon dioxide can react with sodium hydroxide solution to produce sodium carbonate and water. However, in the experimental class of ”exploring the nature of acids and bases“, he did not see obvious phenomena when he introduced carbon dioxide into sodium hydroxide solution. Xiao Ming was very confused, how to prove that the reaction of carbon dioxide and sodium hydroxide solution? Second, the experimental design of the packet design for Xiao-Ming raised the question, the teacher said: ”For no obvious experimental chemical reaction can be proved Reactants disappear and