Effect of electrolytes and non-electrolyte on micellar behaviour of lanthanum soaps in non-aqueous solvents

摘要

The miceller behaviours of the solution of lanthanum butyrate and caprylate in a mixture of benzene and methanol in presence of uni-, bi- and trivalent electrolytes and non-electrolytes were studied by the means of conductivity measurements, and the results were used to evaluate the critical micelle concentration (CMC) and the free energy change for the process of micellization. The CMC was found to decrease with increasing ionic radii of electrolytes. The results show that these soaps behave as weak electrolytes in dilute solutions below the CMC.