Analysis of Activity Coefficients in Aqueous Solutions of Alkali Metal Bromides Based on Dielectric Properties

I. Yu. Shilov; Шилов И. Ю.; A. K. Lyashchenko; Лященко А. К.

doi:10.31857/S0044457X23600056

Analysis of Activity Coefficients in Aqueous Solutions of Alkali Metal Bromides Based on Dielectric Properties

Authors: Shilov I.Y.¹, Lyashchenko A.K.²
Affiliations:
1. Chemistry Department, Moscow State University
2. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
Issue: Vol 68, No 7 (2023)
Pages: 961-964
Section: ФИЗИКОХИМИЯ РАСТВОРОВ
URL: https://rjmseer.com/0044-457X/article/view/665230
DOI: https://doi.org/10.31857/S0044457X23600056
EDN: https://elibrary.ru/RIHQHN
ID: 665230

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Abstract

Extended Debye–Hückel (EDH) theory was used to calculate activity coefficients in aqueous solutions of alkali-metal bromides at 298 K from experimentally determined values of their static permittivities. Calculations with non-optimized model parameters fit the nonmonotonic concentration-dependent trend of the activity coefficients and the cation radius–dependent trend of the activity coefficients. The latter is explained by hydration weakening and ion association strengthening in response to increasing cation radius in the salt series.

Keywords

electrolyte solution, dielectric permittivity, ion association, hydration

About the authors

I. Yu. Shilov

Chemistry Department, Moscow State University

Email: ignatshilov@mail.ru
119991, Moscow, Russia

A. K. Lyashchenko

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Author for correspondence.
Email: ignatshilov@mail.ru
119991, Moscow, Russia

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