Lumps of impure copper typically contain impurities such as silver, gold, cobalt, nickel, and zinc. Cobalt, nickel, and
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Lumps of impure copper typically contain impurities such as silver, gold, cobalt, nickel, and zinc. Cobalt, nickel, and
Lumps of impure copper typically contain impurities such assilver, gold, cobalt, nickel, and zinc. Cobalt, nickel, and zincare oxidized from the copper lump and exist as ions in theelectrolyte. Silver and gold are not oxidized and form part of aninsoluble sludge at the base of the cell. Why is it essential thatsilver and gold are not present as cations in the electrolyte?