Balancing Redox Equations Worksheet

Balancing Redox Equations

Balance the following redox equations using the half-reaction method. Clearly show all steps, including oxidation states, half-reactions, and electron transfer. Indicate whether the solution is acidic or basic as specified.

1. Balance the following redox reaction in acidic solution:

Cr₂O₇²⁻(aq) + C₂H₅OH(aq) → Cr³⁺(aq) + CO₂(g)

2. Balance the following redox reaction in acidic solution:

MnO₄⁻(aq) + SO₂ (g) → Mn²⁺(aq) + HSO₄⁻(aq)

3. Balance the following redox reaction in basic solution:

CN⁻(aq) + MnO₄⁻(aq) → CNO⁻(aq) + MnO₂(s)

4. Balance the following redox reaction in basic solution:

ClO⁻(aq) + CrO₂⁻(aq) → Cl⁻(aq) + CrO₄²⁻(aq)

5. In the reaction Fe²⁺ → Fe³⁺ + e⁻, what is happening to the iron ion?

6. In a redox reaction, the reducing agent is oxidized.

7. Oxidation is the   of electrons, while reduction is the   of electrons.