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Topic 11: Redox and electrochemistry

24. Electroplating cell diagram: Interpreting electroplating cell diagram.

Answer questions 1 – 10 based on the cell diagram below.

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- Teacher Preview Copy

1. In this electroplating cell diagram, the substance or object oxidized is
2+
1) Ni atom 2) Ni ions 3) The battery 4) The spoon

2. Which is reduced? 2) Ni ions 3) The battery 4) The spoon
2+
1) Ni atom

3. The reducing agent in thee redox reaction that occurs in this cell is
2+
1) The spoon 2) The battery 3) Ni 4) Ni

4. The Nickel bar in this diagram acts as the
1) Anode, and is positive 3) Cathode, which is the positive electrode
2) Anode, and is negative

4) Cathode, which is the negative electrode

5. Which statement best describes the spoon in this diagram?
1) It acts as the anode, and is negative
3) It acts as the cathode, and is negative
2) It acts as the anode, and is positive 4) It acts as the cathode, and is positive Need Help? Study Book Pg 284 Set 36

6. In this electrolytic cell, the negative electrode is the
1) Cathode, at which reduction occur 3) Anode, at which reduction occurs
2) Cathode, at which oxidation occurs 4) Anode, at which oxidation occurs

7. The positive electrode in this electroplated diagram is the
1) Anode, where electron are lost 3) Cathode, where electrons are lost
2) Anode, where electrons are gained 4) Cathode, where electrons are gained

8. Which correctly shows the half-reaction at the cathode?
1) Ni(s) + 2e ------------ Ni (aq) 3) Ni (aq) + 2e ---- Ni(s)
2+
2+
-
-
2+(
2+
-
2) Ni(s) ----------------------- Ni aq) + 2e 4) Ni (aq) ------------- Ni(s) + 2e

9. Which correctly shows the reaction at the positive electrode?
2+
-
-
2+
1) Ni(s) + 2e ------------ Ni (aq) - 3) Ni (aq) + 2e ---- Ni(s) -
2+(
2+
2) Ni(s) ----------------------- Ni aq) + 2e 4) Ni (aq) ------------- Ni(s) + 2e

10. Which statement correctly describes what occurs in this cell when the switch is closed?
1) The Ni(s) will be oxidized, and the spoon will lose mass
2) The Ni(s) will be oxidized, and the spoon will gain mass
3) The Ni(s) will be reduced, and the spoon will lose mass
4) The Ni(s) will be reduced, and the spoon will gain mass

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