Reduction of Manganese Dioxide by HCl

MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O

Descripción general

Manganese dioxide oxidizes hydrochloric acid to produce chlorine gas, with Mn(IV) being reduced to Mn(II). Two of the four HCl molecules are oxidized (Cl⁻ → Cl₂) while two provide the acid environment. This was historically the main method for chlorine gas production before the chlor-alkali process.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Hydrochloric Acid HCl 4 (aq)
Producto Chlorine Cl 1 (g)
Producto Water H₂O 2 (l)

Ejemplo cotidiano

This was the reaction Carl Wilhelm Scheele used to discover chlorine gas in 1774, calling it dephlogisticated muriatic acid.

Importancia industrial

Método histórico de Scheele para la obtención de cloro, base del desarrollo de la industria del cloro.

Propiedades

Tipo
Redox
Reversible
No
Energía
Exotérmico
ΔH
-35,0 kJ/mol

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Frequently Asked Questions

What is the equation for Reduction of Manganese Dioxide by HCl?
The balanced equation is: MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O.
What type of reaction is Reduction of Manganese Dioxide by HCl?
Reduction of Manganese Dioxide by HCl is a redox reaction.
Is Reduction of Manganese Dioxide by HCl exothermic or endothermic?
Reduction of Manganese Dioxide by HCl is exothermic (releases energy). The enthalpy change (ΔH) is -35.0 kJ/mol.