Question

The cell reaction Cu + 2Ag⁺ → Cu⁺² +Ag is best
represented by
(a) Cu(s) | Cu⁺² (aq) | | Ag⁺ (aq) | Ag(s)
(b) Pt | Cu⁺² || Ag⁺ (aq) | Ag(s)
(c) Cu⁺² | Cu | | Pt | Ag
(d) None of the above representations

Answer 1

d) None of the above representation

Answer 2

Let us write for it

Explanation:

Electrochemical cell

It it : conversion of chemical energy into electrical energy  occurs .

In it oxidation takes at anode and reduction occurs at cathode .

For example :

In Zn-Cu couple

• Zinc looses electrons and form zinc ions .
• These electrons flow from wire to another half cell .
• In that other beaker , the element has more tendency to gain .Therefore it accepts these electrons and with time the coating starts depositing on electrode .
• The cell reaction can be represented as :

• E/E+// B⁻/B

anode   cathode

Direction of flow of current : from anode to cathode

In the above asked question :(a) Cu(s) | Cu⁺² (aq) | | Ag⁺ (aq) | Ag(s)

is correct .

Because in it : copper has more tendency to loose as compared to silver .