Viscosities of sodium chloride solutions in water-1,4-dioxane binary mixtures with mole fractions of 1,4-dioxane, x D = 0.05, 0.10, 0.15 and 0.20, in the temperature range from 278.15 to 318.15 K were determined. The relative viscosity data have been analyzed and interpreted in terms of the rearranged Jones-Dole equation, (η r-1)-Ac 1/2 = Bc. The viscosity A-coefficients were calculated from Falkenhagen and Vernon theory by help of the literature limiting ionic conductivity data and B-coefficients were estimated from linear plots. All B-coefficients obtained for NaCl water-1,4-dioxane binary mixtures are positive at all temperatures. These data were compared with the data for NaCl in aqueous medium at different temperatures reported in literature. The ion-ion, ion-solvent and solvent-solvent interactions have been discussed.
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