Permanganate Reduction in Basic Solution
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2MnO4− + H2O + 3e− → 2MnO2 + 4OH−
Visão geral
In basic or neutral solution, permanganate is reduced to manganese dioxide (MnO₂) rather than Mn²⁺. The purple solution produces a brown precipitate of MnO₂. This half-reaction is important in organic chemistry where KMnO₄ selectively oxidizes alkenes to diols under mild basic conditions (Baeyer test).
Participantes
| Papel | Substância | Coeficiente | Estado |
|---|---|---|---|
| Reagente | Water H₂O | 1 | (l) |
Exemplo do cotidiano
The Baeyer test uses cold dilute KMnO₄ to detect C=C double bonds in organic molecules, turning purple to brown with a precipitate.
Importância industrial
A oxidação básica com permanganato é utilizada em síntese orgânica para oxidação controlada de alcenos e no tratamento de água para remoção de sabor e odor.
Propriedades
- Tipo
- Redox
- Reversível
- Não
- Energia
- Exotérmico