EFFECT OF ACETAMIDE ON THE CRITICAL MICELLE CONCENTRATION OF AQUEOUS-SOLUTIONS OF SOME SURFACTANTS

The variations of molar conductivity of various surfactants such as so dium caprylate, sodium laurate, sodium palmitate, sodium stearate, sod ium oleate, sodium aodecyl sulphate, and lithium dodecyl sulphate with concentration of the surfactants for each of the solutions consisting of mixtures of varying concentrations of acetamide in water at a cons tant temperature of 30+/-0.2 degrees C were studied. The critical mice lle concentration (CMC) for each surfactant is measured. It is found t hat the CMC values ill mixtures of acetamide and water solutions of va rious surfactants are lower than the CMC values in water. (C) 1997 Els evier Science B.V.