Journal of Surface Science and Technology

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Effect of Sodium Dodecyl Sulphate Micelles on the Oxidation of Dl-Tartaric Acid by Chromic Acid


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1 Department of Chemistry, Berhampur University, Berhampur - 760 007, Orissa, India
     

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Oxidation of dl-tartaric acid by Cr(VI) in aqueous acid medium shows complex kinetics and follows the rate law.

V = k1[Tartaric acid] [H+] + k2 [Tartaric acid] [H+]2 + k3 [Tartaric acid]2 both in absence and presence of sodium dodecyl sulphate. The rate maximum observed in presence of varying [SDS] has been rationalised by Berezin's model conforming to partition of both the reactants between the aqueous and the micellar phases. The substrate, i.e., dl-tartaric acid appears to be bound by hydrophobic effect to the micellar phase while a hydrophilic binding is responsible for binding of Cr(VI) species.


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  • Effect of Sodium Dodecyl Sulphate Micelles on the Oxidation of Dl-Tartaric Acid by Chromic Acid

Abstract Views: 326  |  PDF Views: 2

Authors

Saroj K. Sahu
Department of Chemistry, Berhampur University, Berhampur - 760 007, Orissa, India
Ganesh P. Panigrahi
Department of Chemistry, Berhampur University, Berhampur - 760 007, Orissa, India

Abstract


Oxidation of dl-tartaric acid by Cr(VI) in aqueous acid medium shows complex kinetics and follows the rate law.

V = k1[Tartaric acid] [H+] + k2 [Tartaric acid] [H+]2 + k3 [Tartaric acid]2 both in absence and presence of sodium dodecyl sulphate. The rate maximum observed in presence of varying [SDS] has been rationalised by Berezin's model conforming to partition of both the reactants between the aqueous and the micellar phases. The substrate, i.e., dl-tartaric acid appears to be bound by hydrophobic effect to the micellar phase while a hydrophilic binding is responsible for binding of Cr(VI) species.