碱金属氟化物水溶液中活性系数与介电常数之间的关系

IF 0.7 4区化学 Q4 CHEMISTRY, PHYSICAL Russian Journal of Physical Chemistry A Pub Date : 2024-09-11 DOI:10.1134/s0036024424701383

I. Yu. Shilov, A. K. Lyashchenko

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引用次数: 0

摘要

摘要根据广义德拜-胡克尔理论，利用溶液静介电常数的实验值，计算了 298 K 时碱金属氟化物在水溶液中的活度系数。结果表明，没有优化模型参数的计算再现了活性系数的非单调浓度依赖性。活度系数与阳离子半径的关系可以用离子结合力随半径增大而减弱来解释。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Relationship between Coefficients of Activity and Dielectric Constants in Aqueous Solutions of Alkali Metal Fluorides

Abstract

Coefficients of activity of alkali metal fluorides at 298 K in aqueous solutions are calculated according to the generalized Debye–Hückel theory using experimental values of the static dielectric constant of solutions. It is shown that calculations without optimized model parameters reproduce the nonmonotonic concentration dependence of the coefficients of activity. The dependence of the coefficients of activity on the radius of a cation is explained by the weakening of ionic association as the radius grows.

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来源期刊

Russian Journal of Physical Chemistry A 化学-物理化学

CiteScore

1.20

自引率

14.30%

发文量

376

审稿时长

5.1 months

期刊介绍： Russian Journal of Physical Chemistry A. Focus on Chemistry (Zhurnal Fizicheskoi Khimii), founded in 1930, offers a comprehensive review of theoretical and experimental research from the Russian Academy of Sciences, leading research and academic centers from Russia and from all over the world. Articles are devoted to chemical thermodynamics and thermochemistry, biophysical chemistry, photochemistry and magnetochemistry, materials structure, quantum chemistry, physical chemistry of nanomaterials and solutions, surface phenomena and adsorption, and methods and techniques of physicochemical studies.