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Depict the galvanic cell in which the re...

Depict the galvanic cell in which the reaction
`Zn(s)+2Ag^(+)(aq)toZn^(2+)(aq)+2Ag(s)` takes place. Further show:
(i) which of the electrode is negatively charged?
(ii). The carriers of the current in the cell.
(iii). Individual reaction at each electrode.

A

`Ag|Ag^(+)||Zn|Zn^(2+)`

B

`Zn|Zn^(2+)||Ag^(+)|Ag`

C

`2Ag|Ag^(+)||Zn|Zn^(2+)`

D

`Zn|Zn^(2+)||2Ag|Ag^(+)`

Text Solution

Verified by Experts

The correct Answer is:
B
For the cell reaction
`Zn(s)+2Ag^(+)(aq)rarr2Ag(s)+Zn^(2+)(aq)`
The two half cell reactions are
`Zn(s)rarrZn^(2+)(aq)+2e^(-)`
`Ag^(+)(aq)+e^(-)rarrAg(s)xx2`
`Zn(s)+2Ag(aq)rarrZn^(2+)+2Ag(s)`
Therefore Zn is oxidised and as such acts as -ve electrode or anode. `Ag^(+)` ions get reduced as such Ag electrode acts as cathode or _ve electrode. Therefore cell representation is
`Zn|Zn^(2+)||Ag^(+)|Ag`
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