Parameters of the Isothermal Equation of State of Aqueous Inorganic Electrolyte Solutions and the Nature of Cations and Anions

B. R. Churagulov, A. N. Baranov, A. A. Burukhin, S. L. Lyubimov, Yu V. Kolen'ko

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Abstract

The parameters of the equations of state based on the Tammann-Gibson rule - the effective pressure Pe) and electrolyte volume in solution V2IS - are determined for 32 electrolytes based on the experimental values of specific volumes of aqueous electrolytes at atmospheric pressure (v0) and 100 MPa (vp). The coefficients of equations are selected to fit the concentration variations of these parameters. Their relations to the nature of cations and anions of the electrolyte are elucidated. For selected electrolytes (sodium sulfate, magnesium sulfate, barium nitrate), the discrepancy between the vp values calculated from the Tammann-Gibson rule and the values deduced from precise measurements is below the experimental error of vp determination. The equations of state deduced permit one to compute the specific volumes of electrolyte solutions, partial molar volumes of the solution constituents over a wide span of concentrations, and water solubilities of salts at any pressure from 0.1 to 300 MPa.

Original languageEnglish
Pages (from-to)1423-1427
Number of pages5
JournalRussian Journal of Inorganic Chemistry
Volume42
Issue number9
Publication statusPublished - Sep 1997
Externally publishedYes

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