Dependences of the osmotic coefficients of aqueous calcium chloride solutions on concentration at different temperatures
- Authors: Rudakov A.M.1, Sergievskii V.V.1, Nagovitsyna O.A.1
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Affiliations:
- National Research Nuclear University
- Issue: Vol 91, No 12 (2017)
- Pages: 2361-2365
- Section: Physical Chemistry of Solutions
- URL: https://journals.rcsi.science/0036-0244/article/view/169797
- DOI: https://doi.org/10.1134/S0036024417110188
- ID: 169797
Cite item
Abstract
A model that considers the contributions from hydration, ion association, and electrostatic interactions to the nonideality of 2‒1 electrolyte solutions is substantiated. The parameters of the model’s equations are the mean ion hydration number, the spread of the distribution of hydrated ion stoichiometric coefficients in the standard state, and the number of association. The model is successfully used to describe literature experimental data on the concentration dependence of osmotic coefficients of aqueous CaCl2 solutions at temperatures ranging from 0 to 100°C. The modeling of the above systems shows that as the temperature rises, the hydration number falls slightly, the distribution of the hydration number broadens, and the ion paring of the salt rises by the first degree.
About the authors
A. M. Rudakov
National Research Nuclear University
Email: vserg@mail333.com
Russian Federation, Moscow, 115409
V. V. Sergievskii
National Research Nuclear University
Author for correspondence.
Email: vserg@mail333.com
Russian Federation, Moscow, 115409
O. A. Nagovitsyna
National Research Nuclear University
Email: vserg@mail333.com
Russian Federation, Moscow, 115409