Ionic strength dependence in dilute common-ion electrolyte mixtures

The relation between the coefficients of the Harned's rule behavior and the mixing coefficients in the expression for the total excess free energy of a common-ion mixture is elucidated. The results are used to see if the strong ionic-strength dependence of theg ₁ coefficient is reflected in certain modified Harned's coefficients. This is the case for the system studied; moreover, in this case the experimental data are in agreement with the theoretical model calculation made previously.Contribution in memory of Prof. R. A. Robinson.