氯化锂水溶液在不同温度下的水分活度分析

Water Activity Analysis of Lithium Chloride Aqueous Solution at Different Temperatures

本文采用分析纯一水氯化锂试剂,将三级实验室用水稀释成不同浓度的氯化锂溶液,分别在20℃、25℃、30℃、35℃的温度下测量氯化锂溶液水分活度。测量结果表明,随着氯化锂浓度的增大,其水分活度值逐渐减小;同一浓度的氯化锂溶液随着温度的升高,其水分活度值也随之增大;温度对氯化锂溶液水分活度的影响随着其浓度的增大而增大。

The pure monohydrate lithium chloride reagent was analyzed and diluted into lithium chloride aqueous solutions of different concentrations with three grade laboratory water.The water activity value of prepared lithium chloride solution was measured at 20℃,25℃,30℃ and 35℃ respectively.The results show that the water activity value decreases with the increase of the concentration of lithium chloride.The water activity value of the same concentration of lithium chloride solution increases with the increase of temperature,and the influence of temperature on the water activity of lithium chloride solution increases with the increase of its concentration.