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The standard reduction potential E^(@), ...

The standard reduction potential `E^(@)`, for the half reaction are :
`{:(Zn rarr Zn^(2+) + 2e^(-),,,E^(@) = 0.76 V),(Cu rarr Cu^(2+) + 2e^(-),,,E^(@) = 0.34 V):}`
The emf for the cell reaction, `Zn(s)+Cu^(2+) rarr Zn^(2+) + Cu(s)` is :

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