多组分电解质溶液热力学(Ⅰ)——在298.15K时HCl+NiCl_(2)+H_(2)O体系的活度系数

Thermodynamics of Muiticomponent electrolyte Solutions(Ⅰ)——Activity Coefficient for the System HCl+ NiCl_(2)+H_(2)O at 298.15K

本文用EMF法测定了25.00±0.02℃时,总离子强度由0.1到5.0mol kg^(-1)的HO1-NiCl_(2)-H_(2)O体系中盐酸的活度系数,列入表1。实验方法同文献[1]。实验结果表明,离子强度高达5.0mol kg^(-1)时,HCl仍然遵守Harned规则,即扩展的Harned方程式。

Activity coefficient for HC1 in the system HCl+ NiCl_(2) + H_(2)O with constant total ionic strengths have been measured at 298.15K by the EMF method. Treated by using Har-ned’s and Pitzer’s equations for the mixed electrolyte solutions the results showed that the coefficient obeys Harned’s Rule in the mentioned condition above. The mixing parameters 0 and ψ in Pitzer’s equation have been obtained by using three methods and the activity coeffcients for the salt NiCl_(2) derived from them are in agreement with each other within expcrement error.