Electrical conductance of sodium dodecyl sulfate in calcium nitrate tetrahydrate plus acetamide melts

The specific conductance of sodium dodecyl sulfate (SDS) in molten mixtures of calcium nitrate tetrahydrate (CNTH) and acetamide was measured at 38 de greesC. In these molten mixtures SDS undergoes micellization and the values of the critical micelle concentration (cmc) were estimated. The shape of t he specific conductance versus concentration of SDS isotherm depends on the relative amounts of the hydrated salt and acetamide present in the molten mixture. The slope of this isotherm is positive in the acetamide-rich (>sim ilar to 73 mass % acetamide) melt, and it changes to a negative value in th e hydrated salt-rich melt.