Reduction of Manganese Dioxide by HCl
MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O
Visão geral
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
| Papel | Substância | Coeficiente | Estado |
|---|---|---|---|
| Reagente | Hydrochloric Acid HCl | 4 | (aq) |
| Produto | Chlorine Cl | 1 | (g) |
| Produto | Water H₂O | 2 | (l) |
Exemplo do cotidiano
This was the reaction Carl Wilhelm Scheele used to discover chlorine gas in 1774, calling it dephlogisticated muriatic acid.
Importância industrial
Antes da eletrólise, este era o principal método industrial de produção de cloro. Continua a ser uma preparação laboratorial padrão para pequenas quantidades de gás cloro.
Propriedades
- Tipo
- Redox
- Reversível
- Não
- Energia
- Exotérmico
- ΔH
- -35,0 kJ/mol
Reações relacionadas
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)
Hydrogen Peroxide Disproportionation
Displacement of Hydrogen from Acid by Magnesium
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.