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A galvanic cell is made by dipping a Zn ...

A galvanic cell is made by dipping a Zn - rod in 0.1 (M) `Zn(NO_(3))_(2)` and a Pb - rod in `0.25 (M) Pb(NO_(3))_(2)` solution. Calculate EMF of the cell, write the cell reaction and represent the cell. Given : `E_(Pb^(2+)|Pb)^(@)=-0.13V, E_(Zn^(2+)|Zn)^(@)=-0.77V.`

Text Solution

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`Zn+Pb^(2+)rarrZn^(2+)+Pb`
`E=E^(@)-(0.059)/(2)log([Zn^(2+)])/([Pd^(2+)])`
`=0.64-(0.059)/(2)log.(0.1)/(0.25)=0.65V`
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