Balancing Redox Reactions Worksheet
Grade 11 Chemistry worksheet on balancing redox reactions using the half-reaction method in both acidic and basic solutions.
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Balancing Redox Reactions
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Carefully balance each of the following redox reactions using the half-reaction method. Indicate whether the reaction takes place in an acidic or basic solution.
1. Balance the following redox reaction in an acidic solution: Cr₂O₇²⁻(aq) + Fe²⁺(aq) → Cr³⁺(aq) + Fe³⁺(aq)
2. Balance the following redox reaction in an acidic solution: MnO₄⁻(aq) + SO₂ (g) → Mn²⁺(aq) + SO₄²⁻(aq)
3. Balance the following redox reaction in a basic solution: Br⁻(aq) + MnO₄⁻(aq) → Br₂(l) + MnO₂(s)
4. Balance the following redox reaction in a basic solution: Al(s) + NO₃⁻(aq) → AlO₂⁻(aq) + NH₃(aq)
5. In the balanced half-reaction for the oxidation of Fe²⁺ to Fe³⁺ in acidic solution, how many electrons are lost?
1 electron
2 electrons
3 electrons
0 electrons
6. In balancing redox reactions in basic solutions, after balancing oxygen with water and hydrogen with H⁺, you must add to both sides to neutralize the H⁺ ions.
7. Oxidation involves the gain of electrons, while reduction involves the loss of electrons.
True
False
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