The mechanism of the oxidation of thiocyanate ion by peroxomonosulphate in aqueous solution. II. Kinetics of the reaction

Abstract

Initial rates of reaction for the above oxidation have been measured by a stopped-flow conductance method. Between pH 2 and 3.6, the initial rate of reaction, R, is given by the expression R{[HSO₅^-]+[SCN^-]} = {k_b+k_c[H⁺]}[HSO₅^-]₀[SCN-]²₀+k_a[H⁺]^-1[HSO₅]²₀[SCN^-]₀ As pH increases, there is a transition to a pH-independent rate, first order in each thiocyanate and peroxomonosulphate concentrations.