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固态物质(溶质)从溶液里析出的过程,叫做物质的结晶,简称析晶。这方面的计算是指已知某物质在不同温度下的溶解度和在某温度时的饱和溶液的质量,当饱和溶液从某一温度降低到另一温度时,求能析出的溶质质量。此类题的计算方法很多,现只谈利用质量守恒来运算(笔者认为此法易于掌握而简便)。依质量守恒,原溶液中溶质的质量,必定等于析出晶体所含溶
The process of precipitation of a solid substance (solute) from a solution is called the crystallization of matter, or simply called crystallization. This calculation refers to the known solubility of a substance at different temperatures and the mass of a saturated solution at a certain temperature. When the saturated solution is reduced from a certain temperature to another temperature, the mass of solute that can be precipitated is determined. There are many ways to calculate such questions. We will now only talk about the use of conservation of quality (I think this method is easy to grasp and simple). According to conservation of mass, the quality of the solute in the original solution must be equal to that of the precipitated crystal.