Transference numbers of a 2:2 electrolyte: magnesium sulphate in water at 25°C

Abstract

The cation- and anion-constituent transference numbers of 0.005, 0.01, 0.025 and 0.05 mol dm^–3 aqueous solutions of magnesium sulphate at 25°C have been determined by the direct moving boundary method. Care was taken to see that the results were independent of current and of the nature and initial concentrations of the indicators employed. The concentration variation of the transference numbers is moderately well accounted for by the Fuoss–Onsager theories.