Theory for the determination of activity coefficients of strong electrolytes with regard to concentration dependence of hydration numbers

A new theory of electrolyte solutions is discussed which, as opposed to the Debye–Huckel method valid for relatively small concentrations only, enables one to describe the thermodynamic properties of electrolyte solutions over a wide range of state parameters. The novelty of the proposed theory is t...

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Bibliographic Details
Published in:	The Journal of chemical thermodynamics Vol. 41; no. 2; pp. 155 - 160
Main Authors:	Afanas’ev, Vladimir N., Zaitsev, Alexandr A., Ustinov, Alexandr N., Golubev, Vasily A.
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ltd 01-02-2009 Elsevier
Subjects:	Activity coefficient Compressibility of hydrated complexes Hydration numbers Activity coefficient Compressibility of hydrated complexes Hydration numbers
Online Access:	Get full text
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Summary:	A new theory of electrolyte solutions is discussed which, as opposed to the Debye–Huckel method valid for relatively small concentrations only, enables one to describe the thermodynamic properties of electrolyte solutions over a wide range of state parameters. The novelty of the proposed theory is that it takes into account the dependence of hydration numbers upon concentration, the fact that failed to attract much attention before. The applicability of the theory to the calculation of activity coefficients of some electrolytes (LiCl, NaCl, KCl, RbCl, and CsCl) is demonstrated. A method is proposed for the determination of the thermodynamic parameters of solvation of separate ions.
ISSN:	0021-9614 1096-3626
DOI:	10.1016/j.jct.2008.10.003