Calculating the thermodynamic properties of aqueous solutions of alkali metal carboxylates

被引：0

作者：

A. M. Rudakov

V. V. Sergievskii

T. V. Zhukova

机构：

[1] National Nuclear Research University (MEPhI),

来源：

Russian Journal of Physical Chemistry A | 2014年 / 88卷

关键词：

aqueous solutions; alkali metal carboxylates; osmotic coefficients; activity coefficients; modified Robinson-Stokes equation; hydration; association;

D O I：

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学科分类号：

摘要：

A modified Robinson-Stokes equation with terms that consider the formation of ionic hydrates and associates is used to describe thermodynamic properties of aqueous solutions of electrolytes. The model is used to describe data on the osmotic coefficients of aqueous solutions of alkali metal carboxylates, and to calculate the mean ionic activity coefficients of salts and excess Gibbs energies. The key contributions from ionic hydration and association to the nonideality of solutions is determined by analyzing the contributions of various factors. Relations that connect the hydration numbers of electrolytes with the parameters of the Pitzer-Mayorga equation and a modified Hückel equation are developed.

引用

页码：903 / 907

页数：4