Grade 12 Oxidation Chemistry Worksheet
This worksheet covers key concepts in oxidation, including definitions, identifying oxidizing and reducing agents, balancing redox reactions, and understanding standard electrode potentials, suitable for Grade 12 Chemistry students.
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Grade 12 Oxidation Chemistry
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which of the following best defines oxidation in terms of electron transfer?
Gain of electrons
Loss of electrons
Sharing of electrons
Transfer of protons
2. In the reaction 2Na + Cl2 → 2NaCl, which species is oxidized?
Na
Cl2
NaCl
Both Na and Cl2
3. An oxidizing agent is a substance that causes another substance to be , and in the process, the oxidizing agent itself is .
4. The process of gaining electrons is called .
5. Rusting of iron is an example of a reduction reaction.
True
False
6. In a redox reaction, the number of electrons lost by the reducing agent must equal the number of electrons gained by the oxidizing agent.
True
False
7. Identify the oxidizing agent and the reducing agent in the following unbalanced reaction: MnO2 + 4HBr → MnBr2 + Br2 + 2H2O
8. Explain how to determine the oxidation state of an element in a polyatomic ion.
9. Observe the image below, which shows a rusted chain. Describe the chemical process occurring and write a simplified chemical equation for the formation of rust.
10. Balance the following redox reaction in an acidic medium using the half-reaction method:
Cr2O7^2- (aq) + SO3^2- (aq) → Cr^3+ (aq) + SO4^2- (aq)