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水是中学化学课程里最常见、最重要的物质之一,无论是作为溶剂、反应物,还是在化学实验中都具有很重要的作用。下面结合笔者的教学经验,把水在中学化学实验中的作用做一简单小结,供大家参考。1.作溶剂。在中学化学实验的教学中,水是一种很重要的溶剂。(1)配置溶液。如配制氯化钠溶液、氯水、硫酸溶液等。(2)固体溶解度的测定。如 KNO_3的溶解度测定等。
Water is one of the most common and important substances in the middle school chemistry curriculum, and plays an important role both as a solvent, a reagent, and a chemical experiment. The following combination of the author’s teaching experience, the role of water in the middle school chemistry experiments to do a simple summary for your reference. 1. As a solvent. In the teaching of chemistry experiments in middle schools, water is a very important solvent. (1) Configuration solution. Such as the preparation of sodium chloride solution, chlorine water, sulfuric acid solution. (2) Determination of solid solubility. Such as KNO_3 solubility measurement.