Permanganate Reduction in Basic Solution

2MnO4− + H2O + 3e− → 2MnO2 + 4OH−

概要

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).

参加者

役割 物質 係数 状態
反応物 Water H₂O 1 (l)

日常の例

The Baeyer test uses cold dilute KMnO₄ to detect C=C double bonds in organic molecules, turning purple to brown with a precipitate.

産業上の重要性

塩基性過マンガン酸酸化は有機合成におけるアルケンの制御された酸化や、水処理における味・臭気除去に使用される。

特性

タイプ
Redox
可逆的
いいえ
エネルギー
発熱性

関連する反応

Iron(II) to Iron(III) Oxidation by Oxygen Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Displacement of Hydrogen from Acid by Magnesium

Frequently Asked Questions

What is the equation for Permanganate Reduction in Basic Solution?
The balanced equation is: 2MnO₄⁻ + H₂O + 3e⁻ → 2MnO₂ + 4OH⁻.
What type of reaction is Permanganate Reduction in Basic Solution?
Permanganate Reduction in Basic Solution is a redox reaction.
Is Permanganate Reduction in Basic Solution exothermic or endothermic?
Permanganate Reduction in Basic Solution is exothermic (releases energy).