Potassium hypomanganate
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Potassium hypomanganate, K3MnO4, is a bright blue salt and a rare example of a manganese(V) compound. It is formed:
- by the reduction of potassium permanganate with excess potassium sulfite;[1][2]
- MnO−4 + SO2−3 + H2O → MnO3−4 + SO2−4 + 2 H+
- by disproportionation when manganese dioxide is dissolved in a concentrated solution of potassium hydroxide;[1]
- 2 MnO2 → MnO3−4 + Mn3+
References
- ↑ 1.0 1.1 Cotton, F. Albert; Wilkinson, Geoffrey Advanced Inorganic Chemistry, 4th ed.; Wiley: New York, 1980; p 746. ISBN 0-471-02775-8.
- ↑ Greenwood, Norman N.; Earnshaw, A. Chemistry of the Elements; Pergamon: Oxford, 1984; p 1222. ISBN 0-08-022057-6.
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