Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.

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Solution

Electrolytic refining is a process of refining a metal by the process of electrolysis. The main purpose of electrolytic refining is to purify the metals from the ores. With the use of electricity, the electrolysis technique is carried to purify impure Copper ( $Cu$ ).
Anode Impure copper ( $Cu$ )
Cathode Pure copper ( $Cu$ )
Electrolyte Copper sulphate ( ${CuSO}_{4}$ ) solution.

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In the electrolytic refining of Copper (electrolyte is $C u S O_{4}$ solution + dil $H_{2} S O_{4}$ _;Pure Cu cathode and Impure Cu anode), metallic impurities having lower oxidation potential than Cu are deposited as __ sludge.

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C u S O_{4}

solution + dil

H_{2} S O_{4}

;Pure Cu cathode and Impure Cu anode), metallic impurities having ___ than Cu are deposited as anode sludge.

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Anode	Impure copper ( $Cu$ )
Cathode	Pure copper ( $Cu$ )
Electrolyte	Copper sulphate ( ${CuSO}_{4}$ ) solution.