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Thermodynamics of mixed electrolyte solutions. VI. An isopiestic study of a pseudo-ternary system: NaCl−KCl−MgCl2−H2O at 25°C

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Abstract

Activity coefficients for magnesium chloride in the aqueous pseudo-ternary system sodium chloride-potassium chloride-magnesium chloride were derived from isopiestic measurements at 25°C. The isopiestic data were treated by both McKay-Perring and Scatchard methods, and results obtained agree fairly well over the ionic strength range of 1–6. At constant ionic strength, the activity coefficient of MgCl2 increased with addition of other salts. Interaction coefficients were obtained from Scatchard's and Friedman's formalisms. The excess free energy of mixing was calculated and compared with similar systems.

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Authors and Affiliations

  1. Soreq Nuclear Research Center, Yavne, Israel

    D. Saad & J. Padova

  2. Hebrew University, Jerusalem, Isreal

    Y. Marcus

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  1. D. Saad
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  2. J. Padova
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  3. Y. Marcus
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Saad, D., Padova, J. & Marcus, Y. Thermodynamics of mixed electrolyte solutions. VI. An isopiestic study of a pseudo-ternary system: NaCl−KCl−MgCl2−H2O at 25°C. J Solution Chem 4, 983–993 (1975). https://doi.org/10.1007/BF01074740

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  • DOI: https://doi.org/10.1007/BF01074740

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