Kinetics of oxidation of sulphite by hexachloroplatinate(IV) in acidic solution |
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Authors: | Kalyan K. Sen Gupta Sankar Das Shipra Sen Gupta |
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Affiliation: | (1) Department of Chemistry, Jadavpur University, 700032 Calcutta, India |
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Abstract: | Summary The kinetics of the oxidation of sulphite by hexachloroplatinate(IV) has been studied over wide range of experimental conditions. The reaction is first-order in substrate and in platinum(IV). The rate decreases with the increase in acidity. The effect of salt and of changing dielectric constants on the reaction rate have been studied. Values of H and S have been calculated and are 26.3 kJ mol–1 and –35.9 JK–1 mol–1, respectively. On the basis of experimental evidence, a two-electron reduction mechanism is proposed. |
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