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Can a solution o f1 M copper suplhate be stroed in a vessel made of nickel metal ? Give that E^(@) Ni,Ni^(2+)=+0.25"volt" , E^(@) Cu,Cu^(2+)=-34volt or is it possible to stroe copper suplhate solution in a nickel vessel ? |
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Answer» Solution :In this PROBLEM we want to see whether the following reaction takes place or not ltbnr?GT `Ni+CuSO_(4) RARR NiSO_(4)+Cu, i.e NiCu^(2+) rarr Ni^(2+)+Cu` By conventin the cell may be represented as `NiNi^(2+)||Cu^(2+)|Cu` We given oxidation potential as `E_(Ni,Ni^(2))^(@)=+0.25` volt and `E_(Cu,Cu^(2))^(@)=-0.34` volt Henc by reversing the SIGN of oixdation potential the reducitn potential s will Thus EMF comes out to be positive this imlies that `CuSO_(4)` reacts with nickel hence`CuSO_(4)` solution connot be stroed in a nickel vessel Alternatively since `E_(Ni^(2+),Ni)=-0.25` V islower than `E_(Cu^(2+),Cu)^(@)=+0.34` V therefore Ni can easily lose electrons to `Cu^(2+)` ions in other words the following rection `Ni+Cu^(2+)rarrNi^(2+)+Cu` Will occur thus `CuSO_(4)` solution cannot be stored in a nickel vessel |
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