Purification of copper can be acheived by electrorefining copper from an impure copper anode onto a pure coppe?

Purification of copper can be acheived by electrorefining copper from an impure copper anode onto a pure copper cathode in an electrolytic cell. How many hours will it take to plate 17.0 kg of copper onto the cathode if the current passed through the cell is held constant at 33.5 A? Assume the copper in the electrolytic solution is present as Cu2 .

_________ h

hint: Do a series of conversions to find the time needed to plate out 17.0 kg of Cu. The following equalities may be useful:

1 mol e– = 96,485 C

1 A·s = 1 C

2 Answers

  • 1 A = 1 coulomb/sec. Let a coulomb be denoted C. Atomic weight: 63.5

    17kgCu x 1000gCu/1kgCu x 1molCu/63.5gCu x 2EqWtCu/1molCu x 96,485C/1EqWtCu x 1sec/33.5C x 1min/60sec x 1hr/60min = 428 hr

  • Purification Of Copper

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