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Thermodynamics of strong aqueous electrolyte solutions at t = 25 °c described by the Hückel equations
Journal article   Peer reviewed

Thermodynamics of strong aqueous electrolyte solutions at t = 25 °c described by the Hückel equations

D. Rowland and P.M. May
Journal of Chemical & Engineering Data, Vol.59(6), pp.2030-2039
2014
DOI: https://doi.org/10.1021/je500180m
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Abstract

A theoretical framework based on the Hückel equation for activity coefficients has been developed, and the physicochemical properties of 57 binary strong electrolyte solutions at t = 25 °C have been correlated. These properties include the activity and osmotic coefficients, apparent molar relative enthalpies, apparent molar heat capacities, and apparent molar volumes. The correlating equations agree well with property values from the literature up to concentrations of m = 2.0 mol kg-1 for 1:1 electrolytes and m = 0.5 mol kg-1 for 2:1, 1:2, and 3:1 electrolytes. Certain electrolytes could not be satisfactorily represented, including polyprotic acids, 2:2 electrolytes, and the zinc and cadmium halides. In addition to quantifying Hückel equation parameters that can be used for the convenient calculation of physicochemical property values, the results provide a benchmark against which other theoretical frameworks with few adjustable parameters can be compared.

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Citation topics
2 Chemistry
2.89 Ionic, Molecular & Complex Liquids
2.89.462 Excess Molar Volumes
Web Of Science research areas
Chemistry, Multidisciplinary
Engineering, Chemical
Thermodynamics
ESI research areas
Chemistry
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