Answer to Question #328845 in Organic Chemistry for bean

Question

Balance the following redox reaction in an acidic medium:

Mn²⁺(aq) + NaBiO₃(s) → Bi³⁺(aq) + MnO₄^-(aq)

Answer 1

Unbalanced reaction:

Mn²⁺(aq) + NaBiO₃(s) → Bi³⁺(aq) + MnO₄⁻(aq)

Solution:

Oxidation:

Mn²⁺(aq) + 4H₂O(l) → MnO₄⁻(aq) + 8H⁺(aq) + 5e− I ×2

Reduction:

NaBiO₃(s) + 6H⁺(aq) + 2e− → Bi³⁺(aq) + 3H₂O(l) + Na⁺(aq) I ×5

2Mn²⁺(aq) + 8H₂O(l) → 2MnO₄⁻(aq) + 16H⁺(aq) + 10e−

5NaBiO₃(s) + 30H⁺(aq) + 10e− → 5Bi³⁺(aq) + 15H₂O(l) + 5Na⁺

Balanced reaction:

2Mn²⁺(aq) + 5NaBiO₃(s) + 14H⁺(aq) → 2MnO₄⁻(aq) + 5Bi³⁺(aq) + 7H₂O(l) + 5Na⁺(aq)