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Calculate the standard emf of the cell h...

Calculate the standard emf of the cell having the cell reaction.
`Zn(s) + Co^(2+) ( aq) rarr Zn^(2+) ( aq) + Co(s)`
`E_(Zn//Zn^(2+)) ^(@) = 0.76V, E_(Co//Co^(2+))^(@) = 0.25V`

Text Solution

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In this cell, `Zn//Zn^(2+)` is cathode and `Co//Co^(2+)` is anode.
`:. E_("cell")^(@) = E_("cathode")^(@) - E_("anode")^(@) = 0.76 - 0.25 = 0.51V`
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