The balanced half equation between MnO₄⁻ and Fe²⁺ is:

University of Ilorin CHM107 2025 past question

1. MnO₄⁻ + 8H⁺ + 5Fe²⁺ → Mn²⁺ + 4H₂O + 5Fe³⁺
2. MnO₄⁻ + 4H⁺ + 3Fe²⁺ → Mn²⁺ + 2H₂O + 3Fe³⁺
3. MnO₄⁻ + 2H⁺ + Fe²⁺ → MnO₂ + H₂O + Fe³⁺
4. MnO₄⁻ + 6H⁺ + 7Fe²⁺ → Mn²⁺ + 3H₂O + 7Fe³⁺

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