中文摘要：

目的 用湿度计测定KCl的溶解度。方法 以KCl为模型,采用湿度计测定与饱和溶液呈平衡的空气的相对湿度,并用Pitzer模型计算KCl的溶解度,将计算结果与重量分析法的测定值和文献报道值进行比较。结果 湿度计的测定值与重量法的测定值及文献值基本一致。结论 由湿度计测定KCl溶解度的方法简便可行。

英文摘要：

OBJECTIVE To determine the solubility of KCl using a humidity meter. METHODS The relative humidity of the solution - balanted air was determined by a humidity meter, and then the solubility of KC1 was calculated by Pitzer model according to the relative humidity of air. The results were compared with those determined by the gravimetry and reported in the literatures. RESULTS The solubility determined by the humidity meter was generally comparable to those determined by the gravimetry and reported in the literatures. CONCLUSION This article provides a simple and universal way to determine KCl solubility.