Activity and osmotic coefficients for the ternary system (sodium bromide + tetramethylammonium bromide + water) at T=298.15 K

Author： Yan W.   Han S.  

Publisher： Academic Press

ISSN： 0021-9614

Source： Journal of Chemical Thermodynamics, Vol.30, Iss.6, 1998-06, pp. : 743-749

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Abstract

Activity coefficients of sodium bromide in aqueous mixtures of (sodium bromide and tetramethylammonium bromide) were determined by e.m.f. measurements at T=298.15 K and at eight different ionic strengths from (0.1 to 2.5) mol·kg-1. The experimental data were fitted using the Scatchard, Pitzer, and Lim equations, respectively. The osmotic coefficients, excess Gibbs free energies of mixing, and activity coefficients of tetramethylammonium bromide were calculated using Pitzer parameters obtained in this work.

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