1.

Which cell will measure standard electrode potential of copper electrode ?

Answer»

`Pt_((S))|H_(2(g,0.1" bar"))|H_((aq,1M))^(+)||Cu_((aq,1M))^(2+)|Cu`
`Pt_((S))|H_(2(g,1" bar"))|H_((aq,1M))^(+)||Cu_((aq,2M))^(2+)|Cu`
`Pt_((S))|H_(2(g,1" bar"))|H_((aq,0.1M))^(+)||Cu_((aq,1M))^(2+)|Cu`
`Pt_((S))|H_(2(g,1" bar"))|H_((aq,1M))^(+)||Cu_((aq,1M))^(2+)|Cu`

Solution :`underset("Standard Hydrogen electrode, "H_(2)" gas and standard PRESSURE is 1 bar".)ubrace(Pt_((S))|H_(2(g,"1 bar"))|H_((aq,1M))^(+))||underset("Standard copper electrode. "Cu_((aq))^(2+)=1M)ubrace(Cu_((aq,1M))^(2+)|Cu)`
* To MEASURE the electrode potential of any electrode, the concentration in HALF cell must be 1 M and pressure of gas should be 1 bar.


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