“分光光度法测定碘化铅溶度积常数”实验存在的问题及改进

Solution to the Problem of Spectrophotometric Determination of the Solubility Product Constant of Lead Iodide

针对"分光光度法测定碘化铅溶度积常数"实验测定方法中存在的问题,提出了改进方法。用改进后的方法测定碘化铅溶度积常数,减少了实验药品和污染,简化了实验环节和数据处理过程,使实验测定的数据更准确。并且根据热力学公式推导、计算和作图,给出了lnK_(sp)~θ与1/T关系的直线方程,可以判断不同温度时测试结果的准确程度。

Experimental procedure is improved to solve problems of spectrophotometric determination of the solubility product constant of lead iodide. With the improved method, experimental drugs and pollution are reduced,and experimental steps and data analysis are simplified, while keeping the accurate determination. With the derivation,calculation and drawing according to the thermodynamic formula, the linear equation of the relationship between lnKsp^θ and 1/T is given, which can estimate the accuracy of the test results at different temperatures.