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Micelles in Physical Chemistry Laboratory. Surfactant Catalyzed Oxidation of Glycine by Acidic Permanganate

  • Pare, Brijesh ;
  • Kaur, Parwinder ;
  • Bhagwat, V.W. ;
  • Fogliani, Charles
  • Published : 2004.04.20

Abstract

Micellar catalysis is an essential part of theoretical and experimental curricular. The sodium dodecylsulfate (SDS) catalyzed reaction between glycine and potassium permanganate in acidic medium is an ideal kinetic experiment for the secondary and undergraduate physical chemistry laboratory, to show the effect of micellar catalysis on rate of the reaction. The reaction is conducted both with and without SDS to observe the rate enhancement in the presence of surfactant. To show surfactant catalysis a plot between k and [SDS] is plotted. As surfactant catalysis is observed even before the critical micelle concentration of SDS, this pre-micellar catalysis can be understood in the light of positive co-operativity. The value of positive cooperative index (n) has been found to be 2.37. Further, dependence of the reaction rate on substrate and oxidant concentrations is also discussed. The reaction follows pseudo-first-order kinetics. The overall reaction is second order, with first-order dependence on both glycine and permanganate concentrations. The theory of surfactant catalysis is also discussed. With the conditions specified in the experiment, total reaction times are in 3~4 hours lab session, thus allowing several data sets to be acquired in a single laboratory period. Preparation of solutions and procedure is also given in detail.

Keywords

Laboratory;Surfactant;Micellar;Glycine;Permanganate

References

  1. Verma, R.S., Reddy, M.J., Shastry, V.R. J.Chem.Soc.,Perkin Trans.II, 1976,469.
  2. Fendler, J.H. and Fendler, E.J. "Catalysis in Micellarand Macromolecular Systems." Academic press, NewYork, U.S.A., 1975, p 8-24
  3. Bunton, C. A. J. Mol. Liq. 1997, Vol 72, 231 https://doi.org/10.1016/S0167-7322(97)00040-8
  4. Zyka, J. Instrumentation in analytical chemistry. Vol II,Ellis Horwood Limited, West Sussex, England, 1994, p321
  5. Vogel A.I. A text book of quantitative inorganic analysis,ELBS, 1978, edition reprinted in 1986, p 681
  6. Raghavan P.S., Vangalur S., Srinivasan.,VenkatasubramanianN. Ind. J. Chem. Vol. 21 B, 1982, p 42.
  7. Piszkiewicz, D. J. Am. Chem. Soc. 1977, Vol. 99, 1550. https://doi.org/10.1021/ja00447a044
  8. Frost, A. A., Pearson R.G. Kinetics and Mechanism,second edition, Wiley International edition, 1961, p 3.
  9. King, E.L. How chemical reactions occur, W.A.Benzamin,Inc, New York, 1964, p 5
  10. Menger, F.M., and Portnoy, C.E. J. Am. Chem. Soc.1967, Vol.89, 4698. https://doi.org/10.1021/ja00994a023
  11. Morrison, R.T., Boyed, R.N. Organic chemistry, PrenticeHall, New Delhi, 1973, p. 1102

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