Abstract

The mechanism of permanganate reduction in sulphuric acid. and caustic alkali media, on a bubbling smooth platinum electrode was widely investigated. The influence of acidity, temperature change and alkalinity on the behavior of permanganate in the presence of manganous ions was studied. Evidence is given for the presence of two intermediate species in the permanganate reduction process in acid media. Formation of a Mn(III)-sulphuric acid complex was observed, and the conditions under which the redoxy MnO 4 −-Mn(III) system becomes reversible in sulphuric acid media are defined.

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