Interpretation:
The correct statement needs to be chosen to electroplate an iron fork with silver.
Concept introduction:
In electroplating experiment, layer of one metal is formed on another metal to protect it from oxidation and other degradation processes.
Answer to Problem 16STP
Correct Answer: Option (b)
Explanation of Solution
Reason for correct option:
An iron fork can undergo oxidation if exposed to moisture in the air. To prevent it from oxidation, a layer of silver can be formed on it.
This is done such that silver at anode gets oxidized to form silver ion and reaches to the cathode where electrode of iron is present and reduction of silver ion to silver takes place on iron electrode. Therefore, the silver electrode must have more mass than fork so that the desired thick layer of silver can be formed.
Therefore, option (b) is correct.
Reason for incorrect option: Since, reduction takes place at iron electrode, it acts as cathode and silver electrode acts as anode. Thus, statement (b) cannot be correct. Since, oxidation of silver takes place thus;
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