Question

The anode and cathode of two Galvanic cells are given.

Galvanic Cell	Anode	Cathode
Cell 1	Mg	zn
Cell 1	Zn	Ag

A. Mg → Mg²⁺ + 2e^- 

B. Zn²⁺ +2e^- → Zn 

C. Ag⁺ +le^- → Ag 

D. Zn → Zn²⁺ + 2e^- 

E. Ag → Ag⁺ + le^- 

F. Mg²⁺ + 2e^- → Mg 

a. Find out the reactions at the anode and cathode for each cell from the above. 

b. Which metal can act only as cathode? Why?

Answer 1

a. Cell 1: Anode Mg → Mg²⁺ + 2e^- 

Cathode Zn²⁺ + 2e^- → Zn 

Cell 2: Anode Zn → Zn²⁺ + 2e^- 

Cathode Ag⁺ + le^- → Ag 

b. Ag. Lesser tendency to give up electron that is it is a less reactive metal.