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化学是一门以实验为基础的学科,教会学生从理论出发设计并完成实验是非常重要的。从多角度分析问题,无疑能发散学生的思维,选择最佳方案答题。可溶性酸碱盐在溶液中不以物质形式存在,而是以离子形式均一分散到溶液中。因此,从离子角度分析发生在酸碱盐中的反应并设计实验鉴别反应后的溶质,将会在教学中起重要作用。笔者从下列两个方面进行分析。一、设计实验验证废液中的溶质例1.小明将碳酸钠、稀盐酸和澄清石灰水倒入一个
Chemistry is an experiment-based discipline. It is very important for the students to design and experiment from the theory. From a multi-angle analysis of the problem, no doubt able to diverge the thinking of students, choose the best solution to the problem. Soluble acid-base salts do not exist in the form of substances in solution, but are dispersed homogeneously in solution into the solution. Therefore, from the ion point of view of the reaction occurred in the acid-base salt and design experiments to identify the solute after the reaction, will play an important role in teaching. The author analyzes from the following two aspects. First, the design and experimental verification Solute in the waste case 1. Xiao Ming sodium carbonate, dilute hydrochloric acid and clarified lime water into a