Question

State the

1. electrolyte

2. cathode used

3. anode used

4. electrode reaction at cathode

5. electrode reaction at anode

6. product at cathode and anode – during

(a) electroplating an article with nickel

(b) electroplating a spoon with silver

(c) purification of impure copper. 

Answer 1

Article	Electrolyte	Anode used	Cathode used
(a) Electroplating an article with nickel	NiSO4	Nickel metal	Article to be Plated
(b) Electroplating a spoon with silver	Na[Ag(CN)2]	Silver metal	Spoon
(c) purification of impure copper.	Aq. CuSO4	Impure Cu	Pure copper

Electrolytic reaction at cathode

Electrode reaction at anode 

Products at cathode

(a) Ni (ions)

(b) Silver

(c) Copper

Products at anode

(a) SO₄^2– and OH^1- -(ions)

(b) CN^– and OH^1- (ions)

(c) SO₄^2- and OH^1- (ions)