电解质-非电解质混合溶液活度系数的关联及溶解度的推算——Ⅱ.NH_(3)-NaCl-Na_(2)SO_(4)-H_(2)O体系的液固平衡热力学

The Correlation of Activity Coefficlents for the Electrolyte-Nonelectrolyte Mixed Solutions and Prediction of Solubilities——Ⅱ.The Thermodynamics of the Liquid-Solid Phase Equilibria of NH_(3)-NaCl-Na_(2)SO_(4)-H_(2)O System

由于在研究的体系中,Na_(2)SO_(4)是非对称电解质,且能生成水合盐,故推导了由非对称型电解质与非电解质所构成的混合溶液的各组分的活度系数关联通式,并在此基础上讨论了水合盐液固平衡的计算方法.

In the system studied,Na2SO4 is an asymmetric electrolyte.The activity coefficientequations derived in previous paper cannot be applied any more.Moreover,sodiumsulphate can be crystallized out as decahydrate.So it is necessary to consider the watercoefficient in evaluation of the activity of the hydrate.The generalized equations forcalculating the aotivity coefficient of each component in eleotrolyte-nonelectrolyte mixedaqueous solution have been postulated.The values of their mutual action parameter arefound by numerioal regression from experimental data.The solubilities of each soluteare thus predicted.