Viscosity studies of aqueous mixed electrolyte solutions

Abstract

Relative viscosity studies of ternary aqueous mixed electrolyte solutions for the systems KBr-NaBr, KBr-Bu₄NBr, NaCI-NaBr and NaCI-Bu₄NBr at various constant ionic strengths with varying electrolyte mole fractions <i>(y) </i> at 25°C are reported. The data are used to calculate viscosity <i>B</i>-coefficients of the total electrolyte as a function of solute mole fraction. The excess viscosity <i>B</i>-coefficients (<i>B</i>^Ex) have been calculated and found to be distinctly positive for all the systems studied. The variation of <i>B</i>^Ex with <i>y </i> and the magnitudes have been explained in terms cation-cation, anion-anion interactions and the specific structural interactions with solvent water.