Electrical conductance of sodium n-alkyl sulphonates in aqueous solution

Abstract

The electrical conductances of aqueous solutions of an homologous series of sodium n-alkyl sulphonates have been measured at 25°C in the concentration range 5 × 10^–5 to 10^–3 M. From ethyl to dodecyl the Onsager limiting law for 1 : 1 electrolytes is obeyed and values for the equivalent conductance at infinite dilution lie on a smooth curve as a function of chain length. The tetradecyl homologue shows deviations which may be ascribed to reversible dimerization of the long-chain ions.