Low temperature oxidation of oxalic acid with potassium permanganate
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Oxidation of oxalate and oxalic acid with permanganate was studied at ordinary temperature. In the presence of mixtures of Mn2+ and Cu2+ ions the reaction is sufficiently rapid for a visual titration. The end point is attained when a lilac or a faint violet colour appears. A blank experiment is necessary as Cu2+ consumes some permanganate before the end point can be perceived. Other catalysts including Zn2+, Cd2+, Hg2+ and Ag+ ions were tried but were less efficient.
KeywordsOxidation Colour Potassium Physical Chemistry Analytical Chemistry
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