Abstract

STUDY OF PHYSICO CHEMICAL CHARACTER OF RUBIDIUM SOAPS IN ALCOHOLIC SOLVENTS

S.P. Singh Saroha*, K.N. Mehrotra and Deepak Ganjewala

Abstract

The present study is made to investigate the micellar behavior of solutions of rubidium caprylate, caprate and laurate in alcohols (methanol, butanol and pentanol) through the study of density, surface tension and parachore measurements and critical micelle concentration were evaluated from the results. It is revealed that the surface tension of the solution of rubidium soaps increases with the increase in soap concentration. The results of surface tension have been explained on the bases of szyszkowski’s empirical equation  = 0 (1+ X lnY) – X 0 ln C and the value of X, Y and (-X ln Y) were determined. It is also observed that the parachore of soaps solution increases with the mole fraction of the soap. Critical micelle concentration, CMC. is almost independent of the nature of the solvent and behavior of soaps in alcoholic solution is studied successfully on Hammic and Andrew’s mixture equation.

Keywords: surface tension, CMC, inflection, alcohols, parachor, micelle, mole fraction.