The Transference Numbers of the Counter-Ions in Montmorillonite Paste as a Function of Water Film Thickness and Electrolyte Concentration

Abstract

The transference numbers of the counter ions in montmorillonite paste are determined as a function of the thickness of the water film (h) and of the diffuse double layer (1/K). From measured E.M.F. values of a cell with two liquid junction potentials (C~c ~ solution-paste-C~c ~ solution) and by applying the Henderson equation, the transference numbers t+ were calculated. It is shown that the transference numbers of the counter-ions, t+ -~ 1 ifhK --) 0.