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宜城县皖南农学院附中曹锦群认为《化学教学》1985年第一期登载了方绍宣、王宗权同志的《浅谈求解“溶解度”和“析出物”的思路》和胡萍同志的《溶解度和结晶量的简单计算法》两篇文章,提出了关于溶液中晶体析出计算的“比例法”、“守恒法”,这两种方法都是可行的。笔者亦对溶液中晶体析出的计算方法进行过研究,也总结了一种方法——“交叉法”。通过几年来的教学实践证明,用“交叉法”解题,直观性强,方法简单,应用范围较宽,既适合于条件改变时T_1—→T_2
Yizhong County Weinan Agricultural College attached middle school Cao Jinqun believes that “Chemistry Teaching” in the first period of 1985 published the “Solutions to Solve” and “Precipitation” ideas of Comrades Fang Shaoxuan and Wang Zongquan and Hu Ping’s “Solubility and Crystal Quantity” In the two articles of “Simple calculation method”, the “proportional method” and “conservation method” for the calculation of crystal precipitation in solution are proposed. Both of these methods are feasible. The author also studied the calculation method of crystal precipitation in solution, and also summarized a method - “crossover method”. Through the teaching practice over the past few years, it has been proved that using the “cross method” to solve problems is intuitive, the method is simple, and the application range is wide. It is suitable for T_1→→T_2 when conditions change.