What is/are collected as anode mud during electrolytic refining?
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A.
Pure metal
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B.
Impurities
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C.
Hydrogen gas
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D.
Electrolyte solution
Correct Answer:
B. Impurities
Explanation:
In electrolytic refining, the anode is composed of the impure metal being processed. As an electric current passes through the system, the metal at the anode undergoes oxidation and dissolves into the electrolyte solution. The pure metal ions kemudian migrate to the cathode, where they are deposited. However, the insoluble impurities present in the anode do not dissolve or migrate; instead, they settle at the bottom of the electrolytic cell directly beneath the anode. This residue is known as anode mud or anode slime. Therefore, the substances collected as anode mud are the impurities from the metal.
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