Name ________________
Electrolytic Cells-Electroplating
Date:_________________
1. Base your answer to the following question on the diagram below which represents the electroplating of a
metal fork with Ag(s).
Which equation represents the half-reaction that takes place at the fork?
1) Ag+ + NO 3– ® AgNO3
2) AgNO3 ® Ag+ + NO 3–
3) Ag+ + e – ® Ag(s)
4) Ag(s) ® Ag+ + e –
2. Base your answer to the following question on the diagram below of an electrolytic cell in which the
electrodes are tin and copper.
In this electrolytic cell, electrode A is designated as the
1) anode and is positive
2) anode and is negative
3) cathode and is positive
4) cathode and is negative
Chemistry!
Electrolytic Cells-Electroplating
3. The diagram below shows a spoon that will be electroplated with nickel metal.
What will occur when switch S is closed?
1)
2)
3)
4)
The spoon will lose mass, and the Ni(s) will be reduced.
The spoon will lose mass, and the Ni(s) will be oxidized.
The spoon will gain mass, and the Ni(s) will be reduced.
The spoon will gain mass, and the Ni(s) will be oxidized.
4. Given the reaction:
2 H2O + electricity ® 2 H2 + O2
In which type of cell would this reaction most likely occur?
1)
2)
3)
4)
a chemical cell, because it is exothermic
an electrolytic cell, because it is exothermic
a chemical cell, because it is endothermic
an electrolytic cell, because it is endothermic
5. Which energy conversion occurs in an operating electrolytic cell?
1) chemical energy to electrical energy
2) electrical energy to chemical energy
3) nuclear energy to thermal energy
4) thermal energy to nuclear energy
6. Which reaction occurs at the cathode in an electrochemical cell?
1) combustion
2) neutralization
3) oxidation
4) reduction
7. Which statement describes one characteristic of an operating electrolytic cell?
1) It produces electrical energy.
2) It requires an external energy source.
3) It uses radioactive nuclides.
4) It undergoes a spontaneous redox reaction.
8. Which process occurs at the anode in an electrochemical cell?
1) the loss of protons
2) the loss of electrons
3) the gain of protons
4) the gain of electrons
9. In both the electrochemical cell and the electrolytic cell, the anode is the electrode at which
1) reduction occurs and electrons are lost
2) reduction occurs and protons are lost
3) oxidation occurs and electrons are lost
4) oxidation occurs and protons are lost
Chemistry!
Electrolytic Cells-Electroplating
10. In an electrolytic cell, to which electrode will a positive ion migrate and undergo reduction?
1) the anode, which is negatively charged
2) the anode, which is positively charged
3) the cathode, which is negatively charged
4) the cathode, which is positively charged
Chemistry!
Answer Key
Electrolytic Cells
1.
3
2.
1
3.
4
4.
4
5.
2
6.
4
7.
2
8.
2
9.
3
10.
3
Chemistry!