1.

For the calomel electrode Hg,Hg_(2)|Cl^(-)(aq), electrode potential measured at different Cl^(-) ion concentration are plotted against log [Cl^(-)]. The variation is correctly represented by the plot.

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SOLUTION :The half cell reaction of the calomel electrode (written as reduction reaction) is
`Hg_(2)Cl_(2)(s)+2e^(-)to2Hg(l)+2Cl^(-)(AQ)`
`E=E^(@)-(0.0591)/(2)log[CL^(-)]^(2)`
or `E=E^(@)-0.0591log[Cl^(-)]`
THUS, plot of E vs log `[Cl^(-)]` is linear with a negative slope (i.e., E decreases LINEARLY with log `[Cl^(-)]`)


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