TREATMENT OF IONIC TRANSPORT PROCESSES IN ELECTROLYTIC CONDUCTIVITY BY THE DYNAMIC FRICTIONAL FORMALISM OF NONEQUILIBRIUM THERMODYNAMICS

Ionic transport in electrolytic conductivity has been considered in te rms of the dynamic frictional formalism of nonequilibrium thermodynami cs. The treatment includes multicomponent electrolyte mixtures and sol utions containing polyelectrolytes and colloids. It is shown that the dissipation function for the process can be split into two terms chara cterising interionic friction and ion-solvent friction, respectively. The corresponding friction coefficients are well-defined and experimen tally determinable. They have been evaluated for a number of binary el ectrolytes from electrolytic conductivity data found in the literature . For 1:1 electrolytes the reduced interionic friction coefficients va ry slightly and in a regular fashion with concentration. For higher va lency type electrolytes deviations from this behaviour occur, which in general can be explained by ionic association.