Influence of Pressures up to 300 MPa on the Water Solubilities of Poorly Soluble Salts

B. R. Churagulov, S. L. Lyubimov, A. N. Baranov, A. A. Burukhin

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Abstract

An equation based on the Tammann-Gibson rule was derived to calculate valuations in the thermodynamic equilibrium constants of solution (Ap s / K0 s) of inorganic salts (poorly soluble salts among them) in water upon an increase in pressure to 300 MPa. The calculations involve the equation of state of water and the partial molar volumes V̄0 2, 0 and partial molar isothermal compressibilities K̄0 2, 0 of the salt in a standard aqueous solution at atmospheric pressure. For lithium fluoride, which is poorly soluble in water and for which experimental solubility data at 298.15 K and up to 207 MPa pressure are available, the discrepancy between Kp s / K0 S calculated by the equation and derived experimentally is less than 2% over the range of pressures of up to 250 MPa.

Original languageEnglish
Pages (from-to)1489-1493
Number of pages5
JournalRussian Journal of Inorganic Chemistry
Volume44
Issue number9
Publication statusPublished - Sep 1999
Externally publishedYes

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