Balancing Redox Reactions Worksheet
A Grade 9 science worksheet focused on balancing redox reactions using the half-reaction method in both acidic and basic solutions.
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Standards
Topics
Balancing Redox Reactions
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Carefully read each question and follow the instructions to balance the given redox reactions. Show all your work for full credit.
1. In a redox reaction, is the loss of electrons, while is the gain of electrons.
2. The species that gets oxidized is called the agent, and the species that gets reduced is called the agent.
Balance the following redox reaction in acidic solution:
3. Cr₂O₇²⁻(aq) + SO₃²⁻(aq) → Cr³⁺(aq) + SO₄²⁻(aq)
Balance the following redox reaction in basic solution:
4. MnO₄⁻(aq) + C₂O₄²⁻(aq) → MnO₂(s) + CO₂ (g)
5. In acidic solution, H⁺ ions are added to balance oxygen atoms.
True
False
6. Electrons are always added to the side with the higher oxidation state in a reduction half-reaction.
True
False
7. What is the first step when balancing a redox reaction using the half-reaction method?
Balance oxygen atoms
Assign oxidation numbers
Separate into half-reactions
Balance non-O and non-H atoms
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