electrolytic refining lab activity
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You can purify Copper. Impure copper is kept as anode and a thin strip of pure copper is kept as cathode. Electrolyte is CuSO4 solution with dil. H2SO4 (to increase conductivity).
Reaction at cathode: Cu2+ + 2e- = Cu
Reaction at anode: Cu - 2e- = Cu2+
Reaction at cathode: Cu2+ + 2e- = Cu
Reaction at anode: Cu - 2e- = Cu2+
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