Thermodynamic properties of strong electrolytes in aqueous solutions

TLDR

The study presents a generalized analytic correlation for the activity coefficient of strong electrolytes in aqueous solutions. The correlation employs a single salt‑specific parameter B, which can be refined to two ion‑specific parameters, to predict activity, osmotic coefficient, enthalpy, and heat capacity of single and multicomponent solutions. The correlation accurately reproduces experimental data up to an ionic strength of six, and the derived B values enable estimation of activity and osmotic coefficients for many unmeasured salt solutions at 25 °C.

Abstract

Abstract A generalized analytic correlation is presented for activity coefficient. osmotica coefficient, enthalpy, and heat capacity of single and multicomponent strong aqueous solutions. A good correlation for each salt to an ionic strength of six is obtained by assigning a single parameter “ B ” value to each salt. These B values are well approximated by assigning two parameters for each ion. Values presented for the common ions at 25°C allow the estimation of activity and osmotic coefficients of many unmeasured salt solutions.