A standard galvanic cell is constructed with Ag^+ | Ag and Hg^2+ | Hg half cell

Question

A standard galvanic cell is constructed with Ag^+ | Ag and Hg^2+ | Hg half cell compartments connected by a salt bridge. Which of the following statements are correct? (Choose all that apply.) As the cell runs, anions will migrate from the Hg^2+ | Hg compartment to the Ag^+ | Ag compartment. Hg is oxidized at the anode. In the external circuit, electrons flow from the Hg^2+ | Hg compartment to the Ag^+ | Ag compartment. The anode compartment is the Hg^2+ | Hg compartment. The anode compartment is the Ag^+ | Ag compartment.

Explanation / Answer

from data table:

Eo(Ag+/Ag(s)) = 0.800

Eo(Hg2+/Hg(l)) = 0.850

the electrode with the greater Eo value will be reduced and it will be cathode

here:

cathode is (Hg2+/Hg(l))

anode is (Ag+/Ag(s))

electrons flow from anode to cathode, the anions flow from cathode to anode to balance it out

Anion will migrate from Hg2+|Hg compartment to Ag+|Ag compartment

so, 1st option is correct

Ag is oxidised at anode

so, 2nd option is wrong

electron will migrate from Ag+|Ag compartment to Hg2+|Hg compartment

so, 3rd option is wrong

anode is Ag+|Ag compartment

so, 4th option is wrong

5th option is correct

Answer:

option 1 and option 5

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