NEW PERSPECTIVES IN TRANSPORT PHENOMENA IN ELECTROLYTES

Using the Fuoss-Onsager theory we recently obtained simple expressions for the variation with concentration of the transport coefficients of electrolytes in aqueous solution. We studied self-diffusion, conducta nce of binary and ternary ionic mixtures, and micellar systems. We use d in the formulation of the mean spherical approximation (MSA) pair co rrelation functions which yield explicit formulas in terms of the MSA inverse screening length Gamma and the dynamical Debye-Falkenhagen len gths. It was found that the use of more accurate correlation functions , such as HNC, did not produce a significant improvement in the result s. Associated electrolytes are also well described by a natural extens ion of this theory. Our simple expressions yield good agreement with t he experiments for both unassociated and associated electrolytes.