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Isopiestic Investigation of the Osmotic and Activity Coefficients of Aqueous MgSO4 and the Solubility of MgSO4X7H2O(cr) at 298.15K: Thermodynamic Properties of the MgSO4 + H2O System

Published

Author(s)

Donald G. Archer, J A. Rard

Abstract

Isopiestic determinations of the osmotic coefficient of MgSO4(aq) against NaCl(aq) and Kcl(aq) reference standards were performed with long equilibration times ranging to 98 days. A value of the 298.15 K solubility of epsomite, MgSO47H2O was also determined. The new measurements were combined with previous thermodynamic measurements to determine the thermodynamic properties of the MgSO4 +H2O system from the ice-freezing line to 440 K. The thermodynamic measurements were fitted with two different models, an ion-interaction model and a chemical-equilibrium model. The ability of the two models to represent this system was examined.
Citation
Journal of Chemical and Engineering Data
Volume
43
Issue
5

Keywords

aqueous, epsomite, hexahydrate, kieserite, thermodynamic

Citation

Archer, D. and Rard, J. (1998), Isopiestic Investigation of the Osmotic and Activity Coefficients of Aqueous MgSO<sub>4</sub> and the Solubility of MgSO<sub>4</sub>X7H<sub>2</sub>O(cr) at 298.15K: Thermodynamic Properties of the MgSO<sub>4</sub> + H<sub>2</sub>O System, Journal of Chemical and Engineering Data (Accessed June 17, 2024)

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Created September 1, 1998, Updated February 19, 2017