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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)rarrZn^(2+)(aq)+Co(s)`
`E_(Zn//Zn^(2+))^(@)=0.76V,E_(Co//Co^(2+))^(@)=0.25V`

Text Solution

Verified by Experts

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