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一、增设实验的意义1.关于二氧化碳与水、氢氧化钙溶液和氢氧化钠溶液等三种试剂的反应,初三化学新教材(沪教版)未能提供直观形象的演示或探究实验,增设的一组实验能较为有效地解决这个问题。2.增设的一组实验中的每个实验都可以各自独立开来,应用到相应章节的教学中去;又可以组合起来,形成对比,有利于学生对知识的综合。3.增设实验设置了两套方案:第一套方案可作为教
First, the significance of the additional experiments 1. About carbon dioxide and water, calcium hydroxide solution and sodium hydroxide solution and other three reagents reaction, junior high school chemistry textbook (Shanghai Education Edition) failed to provide intuitive image demonstration or inquiry experiment, The additional set of experiments can solve this problem more effectively. 2. Each experiment in the additional set of experiments can be independent and applied to the teaching of the corresponding chapters. It can also be combined to form a contrast, which is conducive to students’ knowledge integration. 3. Addition experiment set up two sets of programs: The first set of programs can be used as a teaching