Balancing Redox Reactions Worksheet
A Grade 12 Chemistry worksheet focusing on balancing redox reactions using the half-reaction method in both acidic and basic solutions.
Includes
Standards
Balancing Redox Reactions
Name:
Date:
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Carefully balance the following redox reactions using the half-reaction method. Show all your work, including identifying oxidation states, writing half-reactions, balancing atoms, balancing charge, and combining half-reactions.
1. Balance the following redox reaction in acidic solution:
Cr₂O₇²⁻(aq) + SO₃²⁻(aq) → Cr³⁺(aq) + SO₄²⁻(aq)
2. Balance the following redox reaction in basic solution:
MnO₄⁻(aq) + C₂O₄²⁻(aq) → MnO₂(s) + CO₂ (g)
3. In a redox reaction, oxidation always involves the gain of electrons.
True
False
4. The sum of the oxidation states in a neutral compound must be zero.
True
False
5. A species that is reduced in a redox reaction is called the agent.
6. When balancing redox reactions in basic solution, ions are added to balance hydrogen atoms.
7. What is the oxidation state of sulfur in SO₄²⁻?
+2
+4
+6
-2
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