Balancing Redox Equations Worksheet
A Grade 12 Chemistry worksheet focusing on balancing redox reactions using both the oxidation number and half-reaction methods.
Includes
Standards
Balancing Redox Equations
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Date:
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Balance the following redox equations using the specified method. Show all your work clearly.
1. Balance the following redox reaction in acidic solution using the oxidation number method:
Cr₂O₇²⁻(aq) + C₂H₅OH(l) → Cr³⁺(aq) + CO₂(g)
2. Balance the following redox reaction in basic solution using the half-reaction method:
MnO₄⁻(aq) + I⁻(aq) → MnO₂(s) + I₂(s)
3. In the reaction Fe²⁺ + MnO₄⁻ → Fe³⁺ + Mn²⁺ (acidic), what is the coefficient for H₂O when the equation is balanced?
2
4
8
16
4. In a redox reaction, the species that loses electrons is said to be , and it acts as the agent.
5. To balance oxygen atoms in acidic solution, you add ; to balance hydrogen atoms, you add .
6. In basic solutions, H⁺ ions are added to balance hydrogen atoms, and then OH⁻ ions are added to both sides to neutralize the H⁺ ions.
True
False