Abstract

A method is proposed for calculating the density of solutions of strong electrolytes using the product of the apparent molar volume of the electrolyte by its molality. This method can be used to calculate the density of mixed electrolyte solutions, for example, when determining the activity by the Gibbs–Duhem equation. According to the literature data on the densities of solutions at 20°C, the apparent molar volumes of NaCl, NaNO₃, KCl, KNO₃, and SrCl₂ are calculated and the high accuracy of calculations is demonstrated.

中文翻译：

---

强电解质混合溶液密度的计算方法

摘要

提出了一种使用电解质的表观摩尔体积乘以摩尔浓度的乘积来计算强电解质溶液的密度的方法。例如，当通过Gibbs–Duhem方程确定活度时，该方法可用于计算混合电解质溶液的密度。根据有关20°C溶液密度的文献数据，计算出NaCl，NaNO ₃，KCl，KNO ₃和SrCl ₂的表观摩尔体积，并证明了计算的高精度。