Hydrogen Peroxide Disproportionation

2H2O2 → 2H2O + O2

概述

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.

参与者

角色 物质 系数 状态
反应物 Hydrogen Peroxide H₂O₂ 2 (aq)
产物 Oxygen O 1 (g)
产物 Water H₂O 2 (l)

日常示例

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

工业重要性

H₂O₂的分解被用于废水处理（催化氧化）和高浓度H₂O₂作为火箭推进剂，过氧化氢酶活性也是食品加工和生物技术中的重要指标。

属性

类型
Redox
可逆
否
能量
放热
ΔH
-196.1 kJ/mol
催化剂
MnO₂ or catalase enzyme

相关反应

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) Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Iodine and Sodium Thiosulfate Titration 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).