Abstract

The kinetics of oxidation of l-ascorbic acid in absence and presence of silver (I) as catalyst has been studied in aqueous acid medium. The stoichiometry corresponds to the reaction as represented by eqn(1). S 2 O 8 2- + C 6 H 8 O 6 -> 2SO 4 2- + C 6 H 6 O 6 + 2H + (1) The order with respect to ascorbic acid is unity in uncatalyzed reaction where as it is zero order in silver (I) catalyzed reaction. The reaction mechanism has been suggested in both the conditions delineating the role of sulfate radical ion.

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