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初中化学试题中,有关溶解度的计算问题属于必须掌握的内容。由于溶解度的计算涉及的概念多、数据多,且计算的方法灵活多样,常使学生感到棘手。笔者就涉及到溶解度差量计算的试题略举几例进行解析。 一、有关晶体析出的计算 例1 已知在t_2℃时某物质的溶解度为S_(高),t_1℃时的溶解度为S_(低)(S_(高)>S_(低))。现将某
In the junior high school chemistry test questions, the calculation of solubility is a must-read content. Because the solubility calculation involves many concepts and data, and the method of calculation is flexible, it often makes students feel intractable. The author will give a few examples of the solubility problems involved in the calculation of the differential analysis. I. Calculation of Crystallization Precipitation Example 1 It is known that the solubility of a substance at t2°C is S_(high), and the solubility at t_1°C is S_(low)(S_(high)>S_(low)). Now some