The reaction between manganese dioxide (MnO₂) and hydrochloric acid (HCl) produces chlorine gas (Cl₂).
Balanced Chemical Equation:
MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂
Explanation:
- MnO₂ acts as an oxidizing agent
- It oxidizes HCl to form chlorine gas
- At the same time, MnO₂ is reduced to MnCl₂
Products Formed:
- Manganese(II) chloride (MnCl₂)
- Water (H₂O)
- Chlorine gas (Cl₂)
Key Insight:
- This reaction is commonly used in laboratories to prepare chlorine gas
- It is a redox reaction:
- Oxidation: Cl⁻ → Cl₂
- Reduction: Mn⁴⁺ → Mn²⁺
Conclusion:
MnO₂ reacts with HCl to produce chlorine gas, making it an important reaction in inorganic chemistry.