Kinetics and mechanism of the oxidation of Orange II by periodate ion in aqueous acid

Abstract

+ + reaction increases with increase in [H ]. Plot of k versus log[H ] gave a slope of one, showing that the reaction is 1 + first order with respect to hydrogen ion concentration. The Plot of k versus [H ] was linear with a positive 2 2 intercept (R = 0.89). The acid dependence of this nature shows that there is a rapid pre-equilibrium between the protonated and non-protonated forms in which both the protonated and unprotonated forms are reactive. The