When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrode are

Question

When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrode are (A) pure zinc as cathode and pure copper as anode (B) impure sample as cathode and pure copper as anode (C) impure zinc as cathode and impure sample as anode (D) pure copper as cathode and impure sample as anode

Tardigrade Admin · Accepted Answer

Impure Cu will oxidise from anode along with Zn but only Cu2+ will reduce on cathode in purification of Cu2+.

Q. When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrode are

pure zinc as cathode and pure copper as anode

impure sample as cathode and pure copper as anode

impure zinc as cathode and impure sample as anode

pure copper as cathode and impure sample as anode

Impure $C u$ will oxidise from anode along with $Z n$ but only $C u^{2 +}$ will reduce on cathode in purification of $C u^{2 +}$ .