Hydrogen Peroxide Disproportionation

2H2O2 → 2H2O + O2

概要

Hydrogen peroxide simultaneously acts as both oxidizing and reducing agent in this disproportionation reaction. One molecule is reduced to water (O goes from -1 to -2) while another is oxidized to oxygen gas (O goes from -1 to 0). Manganese dioxide or the enzyme catalase dramatically accelerate this reaction.

参加者

役割 物質 係数 状態
反応物 Hydrogen Peroxide H₂O₂ 2 (aq)
生成物 Oxygen O 1 (g)
生成物 Water H₂O 2 (l)

日常の例

The fizzing when hydrogen peroxide is applied to a wound occurs because catalase enzyme in blood rapidly decomposes H₂O₂, releasing oxygen bubbles.

産業上の重要性

H₂O₂の分解は廃水処理、高濃度H₂O₂ロケット推進剤、カタラーゼによる生体保護機構に利用される。MnO₂触媒分解は制御された酸素発生に使われる。

特性

タイプ
Redox
可逆的
いいえ
エネルギー
発熱性
ΔH
-196.1 kJ/mol
触媒
MnO₂ or catalase enzyme

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 Hydrogen Peroxide Disproportionation?
The balanced equation is: 2H₂O₂ → 2H₂O + O₂.
What type of reaction is Hydrogen Peroxide Disproportionation?
Hydrogen Peroxide Disproportionation is a redox reaction.
Is Hydrogen Peroxide Disproportionation exothermic or endothermic?
Hydrogen Peroxide Disproportionation is exothermic (releases energy). The enthalpy change (ΔH) is -196.1 kJ/mol.
What conditions are needed for Hydrogen Peroxide Disproportionation?
This reaction requires a catalyst (MnO₂ or catalase enzyme).