Idris, S.O.Tanimu, A.Iyun, J.F.Mohammed, Y.2023-12-142023-12-142014-11-11Mohammed, et. et. (2014) Kinetics and Mechanism of the Reaction of Malachite Green and Dithionite Ionhttps://keffi.nsuk.edu.ng/handle/20.500.14448/5520The kinetics of the oxidation of malachite green, MG+, by dithionite ions, S2O42- have been studied spectrophotometrically in an aqueous acid free medium. The investigation was carried out under pseudo- first order conditions of an excess of dithionite concentration. Reaction conditions were ionic strength of reaction medium, µ = 0.1 mol dm–3, λmax = 620nm and T = 25.5±0.5°C. The stoichiometry of the reaction, determined by spectrophotometric titration, was 1:1. Reaction rates increased with increase in µ and dielectric constant (D) of reaction medium. Added ions catalysis of the reaction and the result of the Michaelis - Menten analysis suggest that the reaction proceeded through the outersphere pathway. A plausible mechanism is proposed.enKinetics; mechanism; outersphere; dithionite ion; malachite green.Article