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Conductometric Study of Short Chain Alkanones and Alkyl Acetates within Anionic Micelles
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The interaction of short chain alkanones and alkyl acetates (alkyl group = methyl to propyl) with the micelles of an anionic surfactant, sodium dodecyl sulfate (SDS), was studied by the conductivity method at 25.0°C. The critical micelle concentration (CMC) of SDS decreases linearly with the increase in the concentration of additives in the low concentration regions. The water-micelle partition coefficient, Kx, and the standard free energy change of penetration, ΔG0P, of each additive from water to micelle were calculated from the limiting slope (dCMC/dCa). The free energy change per methylene group, AΔG0(CH2), has also been evaluated. The Kx values for a given additive increases with the increase in alkyl chain.
Keywords
Critical Micelle Concentration, Sodium Dodecyl Sulfate, Partition Coefficient, Alkanones, Acetates.
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