溶解度是物质溶解性的定量表示,是初中化学的重要知识点。该内容主要考查溶解度曲线的应用,根据固体的溶解度曲线可知:(1)某物质在一定温度下的溶解度,从而确定物质的溶解性。(2)不同物质在同一温度下的溶解度大小,从而判断饱和溶液中溶质质量分数的大小,计算出该温度下某物质饱和溶液的质量分数。(3)物质的溶解度随温度升高的变化趋势,从而判断结晶的方法或混合物分离 Solubility is a quantitative representation of substance solubility and is an important point of knowledge in junior high school chemistry. The content of the main test solubility curve, according to the solid solubility curve shows: (1) the solubility of a substance at a certain temperature in order to determine the solubility of the substance. (2) The solubility of different substances at the same temperature, so as to determine the size of the solute mass fraction in the saturated solution, and calculate the mass fraction of the saturated solution of a certain substance at that temperature. (3) the substance solubility changes with the temperature trend to determine the crystallization method or mixture separation