Hydrogen Peroxide Disproportionation

2H2O2 → 2H2O + O2

Übersicht

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.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Hydrogen Peroxide H₂O₂ 2 (aq)
Produkt Oxygen O 1 (g)
Produkt Water H₂O 2 (l)

Alltägliches Beispiel

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

Industrielle Bedeutung

H₂O₂ decomposition is used in wastewater treatment, as a propellant (concentrated H₂O₂), and catalase activity is important in food processing and biotechnology.

Eigenschaften

Typ
Redox
Reversibel
Nein
Energie
Exotherm
ΔH
-196,1 kJ/mol
Katalysator
MnO₂ or catalase enzyme

Verwandte Reaktionen

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).