Thermodynamics of mixed electrolyte solutions. V. An isopiestic study of the aqueous systems tetra-n-propylammonium bromide-sodium bromide and tetramethylammonium bromide-sodium bromide at 25°C

D. Rosenzweig, J. Padova*, Y. Marcus

*Corresponding author for this work

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Abstract

Osmotic and activity coefficients were measured by the gravimetric isopiestic vapor pressure technique in the aqueous systems tetramethylammonium bromide-sodium bromide and tetra-n-propylammonium bromide-sodium bromide. The excess Gibbs free energy of mixing and Friedman's interaction coefficients were obtained and interpreted in terms of ion-ion interactions leading to self-salting-in in the case of the Pr4NBr-NaBr-H2O system and to salting-out in the case of the Me4NBr-NaBr-H2O system.

Original languageEnglish
Pages (from-to)601-605
Number of pages5
JournalJournal of Physical Chemistry
Volume80
Issue number6
DOIs
StatePublished - 1976
Externally publishedYes

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