Reduction of Manganese Dioxide by HCl
MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O
نظرة عامة
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.
المشاركون
| الدور | المادة | المعامل | الحالة |
|---|---|---|---|
| متفاعل | Hydrochloric Acid HCl | 4 | (aq) |
| منتج | Chlorine Cl | 1 | (g) |
| منتج | Water H₂O | 2 | (l) |
مثال من الحياة اليومية
This was the reaction Carl Wilhelm Scheele used to discover chlorine gas in 1774, calling it dephlogisticated muriatic acid.
الأهمية الصناعية
Before electrolysis, this was the primary industrial method for chlorine production. It remains a standard lab preparation for small amounts of chlorine gas.
الخصائص
- النوع
- Redox
- قابل للعكس
- لا
- الطاقة
- طارد للحرارة
- ΔH
- -35,0 kJ/mol
التفاعلات ذات الصلة
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.