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Consider the following concentration cel...

Consider the following concentration cell`:`
`Zn(s)|Zn^(2+)(0.024M)||Zn^(2+)(0.480M)|Zn(s)`
which of the following statements is `//` are correct?

A

The `EMF` of the cell at `25^(@)C` is nearly `0.038V.`

B

The `EMF` of the cell at `25^(@)C` is nearly `0.038V`.

C

If water is added in `LHE`, so that the` [Zn^(2+)]` is reduced to `0.012M` , the cell voltage increases.

D

If water is added in `LHE`, so that the `[Zn^(2+)]` is reduced to `0.12M` , the cell voltage remains same.

Text Solution

Verified by Experts

The correct Answer is:
a,c
For concentration cell, `E^(c-)._(cell)=0`
`a. E_(cell)=0-(0.059)/(2)log.(0.024)/(0.48)=0.038V` ltbr.` c.[Zn^(2+)]` new in `LHE=0.012`
`:. E^(')._(cell)=0-(0.059)/(2)log.(0.012)/(0.048)=0.0472`
`:.E^(')._(cell)gtE_(cell)`
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