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Abstract
The critical micelle concentration, degree of dissociation and dissociation constant of dilute solutions of thorium soaps in methanol-benzene mixtures were determined from conductivity measurements. The results showed that these soaps behave as weak electrolytes in dilute solutions below the CMC and the CMC increases in presence of Sudan (IV) dye. The various thermodynamic parameters were also evaluated for both dissociation and micellization processes.