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《在图解法讲授“物质的结晶”一节中计算题的教学方案》一文中(见本刊八二年第二期)笔者曾就结晶计算归纳成一个通用图表。这个通用图表不仅适用于结晶计算,也适用于低温度时的饱和溶液升温后需加入多少溶质才能达到溶解平衡的计算,后者只需将结晶计算通用图表的“高温度”和“低温度”的位置对调,其解题步骤与结晶计算相似。通用图表变为:
In the article “The teaching plan for the calculation of problems in the graphic teaching “Crystals of the material” section” (see the second issue of the magazine in 1982), the author has summarized the crystallization calculation into a general chart. This general chart not only applies to crystallization calculations, but also applies to how much solute needs to be added after the temperature of the saturated solution at low temperature to reach the dissolution equilibrium calculation. The latter only needs to calculate the “high temperature” and “” of the general chart of crystallization calculation. The “low temperature” positional alignment is similar to the crystallization calculation. The general chart becomes: