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命题中以溶液组成的表示方法为出发点,针对性地考察溶液中溶质质量、溶剂质量的确定。与固体溶解度、溶解度曲线相结合考察溶液溶质质量分数的确定。试题中常将溶液中溶质质量分数与化学反应相结合,通过沉淀物或气体物质,计算某成分在原溶液中的质量分数或计算生成物的溶质质量分数。类型一溶液的稀释与溶质质量分数例1(2015·湖南株洲)化学实验室现有质量
The proposition takes the representation of the solution composition as the starting point, examining the solute quality and the solvent quality in a targeted manner. And solid solubility, solubility curve to determine the solution solute mass fraction. Often test solution solute mass fraction and chemical reaction combination, through the sediment or gas material, calculate the mass fraction of a component in the original solution or calculate the solute mass fraction of the product. Type 1 solution dilution and solute mass fraction Example 1 (2015 · Zhuzhou, Hunan) Chemical Laboratory Quality