Ask Question
30 July, 07:06

Balance the following redox reaction if it occurs in acidic solution.

What are the coefficients in front of H2C2O4 and H2O in the balanced reaction?

MnO4 (aq) + H2C2O4 (aq) → Mn2 + (aq) + CO2 (g)

+2
Answers (1)
  1. 30 July, 07:30
    0
    6H⁺ + 2MnO₄⁻ + 5H₂C₂O₄ → 2Mn²⁺ + 10CO₂ + 8H₂O

    Explanation:

    MnO₄⁻ (aq) + H₂C₂O₄ (aq) → Mn²⁺ (aq) + CO₂ (g)

    First of all, determinate the half reaction (reduction/oxidation)

    Reduction - Oxidation state decrease

    Oxidation - Oxidation state increase

    MnO₄⁻ → Mn²⁺

    Manganese acts with + 7 in permanganate, and it's get reduced to Mn²⁺

    C₂O₄⁻² → CO₂

    Carbon changes from + 3 to + 4. It's been oxidized.

    8H⁺ + MnO₄⁻ + 5e⁻ → Mn²⁺ + 4H₂O

    We add 4 water in products side because we have 4 oxygen in reactant side (acidic medium). Aftewards, we balance the protons. Mn to change from + 7 to + 2, has gained 5 moles of electrons.

    C₂O₄⁻² → 2CO₂ + 2e⁻

    We can balance the carbon with 2, so now the half reaction is balanced in charges and atoms. Carbon has released 2 mol of e⁻ (3 + → 4+)

    (8H⁺ + MnO₄⁻ + 5e⁻ → Mn²⁺ + 4H₂O).2

    (C₂O₄⁻² → 2CO₂ + 2e⁻).5

    Let's multiply the reaction x2 and x5, to balance the electrons

    16H⁺ + 2MnO₄⁻ + 10e⁻ → 2Mn²⁺ + 8H₂O

    5C₂O₄⁻² → 10CO₂ + 10e⁻

    We sum both reaction, so we can quit the electrons

    16H⁺ + 2MnO₄⁻ + 5C₂O₄⁻² → 2Mn²⁺ + 10CO₂ + 8H₂O

    Finally the balanced redox reaction is this:

    6H⁺ + 2MnO₄⁻ + 5H₂C₂O₄ → 2Mn²⁺ + 10CO₂ + 8H₂O
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Balance the following redox reaction if it occurs in acidic solution. What are the coefficients in front of H2C2O4 and H2O in the balanced ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers