Which of the following alternatives correctly describes the polarity of, and the reaction that occurs at, the anode of this cell?
anode polarity reaction at the anode
A - VCE - SSCE Chemistry - Question 9 - 2003 - Paper 1
Question 9
Which of the following alternatives correctly describes the polarity of, and the reaction that occurs at, the anode of this cell?
anode polarity reaction at the an... show full transcript
Worked Solution & Example Answer:Which of the following alternatives correctly describes the polarity of, and the reaction that occurs at, the anode of this cell?
anode polarity reaction at the anode
A - VCE - SSCE Chemistry - Question 9 - 2003 - Paper 1
Step 1
negative
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Answer
At the anode, the reaction involves the oxidation of nickel, where solid nickel loses electrons to form nickel ions in solution:
ightarrow Ni^{2+}(aq) + 2e^-$$
This indicates that the anode is negatively charged since oxidation occurs here.
Step 2
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Answer
This option also describes the reaction incorrectly related to silver ions at the anode, hence is not valid. The correct description for the anode consists of the oxidation of nickel.
Step 3
positive
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Answer
This choice incorrectly describes the charge of the anode and mentions a reaction that describes reduction rather than oxidation. Therefore, it's not valid.
Step 4
positive
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Answer
Similar to option C, this choice incorrectly identifies the charge of the anode, while it should perform oxidation, specifically of nickel.
