Grade 12 Chemistry: Oxidation-Reduction Reactions
A worksheet for Grade 12 Chemistry students covering key concepts of oxidation and reduction reactions, including identifying oxidizing and reducing agents, balancing redox equations, and understanding electrochemical cells.
Includes
Standards
Oxidation-Reduction Reactions
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Date:
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. In the reaction: Zn(s) + CuSO₄(aq) → ZnSO₄(aq) + Cu(s), which species is oxidized?
Zn(s)
CuSO₄(aq)
ZnSO₄(aq)
Cu(s)
2. Which of the following is true for an electrochemical cell?
Oxidation occurs at the cathode.
Electrons flow from the cathode to the anode.
Reduction occurs at the cathode.
The anode is positively charged in a galvanic cell.
1. An atom that loses electrons is said to be .
2. The agent that causes reduction is called the agent.
3. In a redox reaction, the sum of the oxidation states of all atoms in a neutral compound must equal .
1. All single displacement reactions are also redox reactions.
True
False
2. The oxidation number of oxygen in peroxides is -1.
True
False
1. Identify the oxidizing agent and reducing agent in the following reaction: Cl₂(g) + 2NaBr(aq) → 2NaCl(aq) + Br₂(l)
2. Balance the following redox reaction in an acidic solution: MnO₄⁻(aq) + SO₃²⁻(aq) → Mn²⁺(aq) + SO₄²⁻(aq)
Match the term with its definition.
1. Oxidation
a. Gain of electrons
2. Reduction
b. Loss of electrons
3. Oxidizing agent
c. Causes oxidation; itself reduced
4. Reducing agent
d. Causes reduction; itself oxidized
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