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What would be the order of the electrolytic cell in an industry intending the production...

Chemistry
JAMB 2024

What would be the order of the electrolytic cell in an industry intending the production of silver plated spoons?

  • A. Cathode is the spoon; anode is a silver rod; electrolyte is a soluble silver salt
  • B. Cathode is a silver rod; anode is the spoon; electrolyte is a soluble silver salt
  • C. Cathode is the spoon; anode is any rod; electrolyte is a soluble silver salt
  • D. Cathode is any rod; anode is the spoon; electrolyte is a soluble salt
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Correct Answer: Option A
Explanation

In an electrolytic refining process, the anode is made of impure metal, and the cathode is made of a strip of pure metal. When an electric current is passed through the electrolyte, metal ions from the electrolyte are deposited as a pure metal on the cathode. A soluble silver salt is used as an electrolyte in the electrolysis of silver metal because it allows for the deposition of a pure metal on the cathode.

In the electrolysis of silver metal, you cannot use any rod at the anode; it is crucial to use a silver rod as the anode because the process relies on the oxidation of silver ions from the silver anode into the solution to deposit pure silver at the cathode; using a different metal would not produce the desired result.  The net result is that silver metal has been transferred from the anode to the cathode.

In summary, a silver rod is used at the anode, the spoon has to be cathode since we must obtain a pure silver spoon while the electrolyte must be a soluble silver salt because it allows easy deposition of metal ions as a pure metal on the cathode.


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