1.

The potential of the cell for the reaction `M_((s))+2H^(+)(1M)toH_(2(g)),(1atm)+M^(2+)(0.1M)` is 1.500 V. the standard reduction potential for `M^(2+)//M_((s))` couple is:-A. 0.1470VB. 1.470VC. 14.70VD. None of these

Answer» Correct Answer - B
`E_(cell)=E_(cell)^(o)=-(0.0591)/(2)log((["products"])/(["Reactants"]))`
`1.5=E_(cell)^(@)-0.0296log[(0.1)/(1)]`
`E_(Cell)^(o)=1.470V`
`E_(Cell)^(o)=E_(H^(+)//H_(2))^(o)-E_(M//M^(2+))^(o)`
`E_(M//M^(2+))^(o)=-1.470`
So, `E_(M^(2+)//M)^(o)=1.470V`.


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