Reduction of Manganese Dioxide by HCl

MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Hydrochloric Acid HCl 4 (aq)
생성물 Chlorine Cl 1 (g)
생성물 Water H₂O 2 (l)

일상 속 예시

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

산업적 중요성

전기분해 이전에는 이것이 염소 생산의 주요 공업 방법이었습니다. 여전히 소량의 염소 가스를 위한 표준 실험실 제조법입니다.

성질

유형
Redox
가역 반응
아니오
에너지
발열
ΔH
-35.0 kJ/mol

관련 반응

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) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) 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.