Manganese Dioxide Precipitation

MnSO₄ + 2NaOH + H₂O₂ → MnO₂↓ + Na₂SO₄ + 2H₂O

Overview

Manganese(II) sulfate is oxidized by hydrogen peroxide in basic solution to form a dark brown precipitate of manganese dioxide. Mn is oxidized from +2 to +4. MnO₂ is highly insoluble and is a very effective catalyst for H₂O₂ decomposition.

Participants

Role	Substance	Coefficient	State
Reactant	Hydrogen Peroxide H₂O₂	1	(aq)
Reactant	Sodium Hydroxide NaOH	2	(aq)
Product	Sodium Sulfate Na₂SO₄	1	(aq)
Product	Water H₂O	2	(l)

Everyday Example

MnO₂ is the black substance in standard alkaline batteries that serves as the cathode material.

Industrial Importance

Manganese dioxide is used in dry cell and alkaline batteries, as a catalyst, as a pigment, and in water treatment for iron and manganese removal.

Properties

Type: Precipitation
Reversible: No
Energy: Exothermic
ΔH: -200.0 kJ/mol

Related Reactions

Aluminum Hydroxide Precipitation Barium Carbonate Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Carbonate Precipitation Calcium Fluoride Precipitation (Fluorite) Calcium Oxalate Precipitation (Kidney Stones) Calcium Phosphate Precipitation (Bone Mineral) Calcium Sulfate Precipitation (Gypsum) Chromium(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Manganese Dioxide Precipitation?

The balanced equation is: MnSO₄ + 2NaOH + H₂O₂ → MnO₂↓ + Na₂SO₄ + 2H₂O.

What type of reaction is Manganese Dioxide Precipitation?

Manganese Dioxide Precipitation is a precipitation reaction.

Is Manganese Dioxide Precipitation exothermic or endothermic?

Manganese Dioxide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -200.0 kJ/mol.