Description

ABSTRACT

The kinetics of Mn (II) catalyzed oxidation of alanine with Cerium (IV) has been studied in Sulphuric acid medium at 40^oC. The reaction is first order with respect to Ce (IV) and Mn (II) and positive fractional order with respect to alanine. The rate of reaction increases with increasing H⁺ concentration and decreases with the increase of [HSO₄^–]. From the dependence of k_obs on the concentration of [HSO₄^–], the kinetically active species has been found to be Ce(SO₄)_2. On the basis of experimental results, a mechanism has been proposed. The rate constants of the rate determining step and activation parameters have been evaluated.

Key Words: Kinetics, Oxidation, Alanine, Mn (II) catalyst, Cerium (IV), Sulphuric acid.