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Electrolytic Refining

Name the cath...

Question

Name the cathode and anode in the electrorefining of copper. [2 MARKS]

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Solution

Each part: 1 Mark

1. In the electrorefining of copper, a plate or rod of impure metal acts as the anode.
2. At the same time, a plate or rod of pure metal acts as the cathode.

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Q. Name the anode, the cathode, and the electrolyte used in electrorefining of impure copper

In the electrorefining process, both anode and cathode should be of same metal.

Q. Anode is the _________ block and cathode is the _________ block in electrorefining of metal.

Q. What is the cathode in electrorefining of copper?

Q. Assertion: Starting from aq. copper [II] sulphate solution, equations for the reactions at the cathode and anode during electrolysis of aq.

C u S O_{4}

using active copper electrodes is;
at anode:

C u^{+ 2} + 2 e^{-} \to C u

C u \to C u^{+ 2} + 2 e^{-}

Reason: Oxidation always take place at anode and reduction at cathode.

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