What is the standard potential of the `Tl^(3+)//Tl` electrode ?
`Tl^(3+)+2e^(-) rarr Tl^(+)," "E^(@)=1.26" volt"`
`Tl^(+)+e^(-) rarr Tl," "E^(@)=-0.336" volt"`

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`{:(Tl^(3+)+2e^(-) rarr Tl^(+), nFE^(@)=2xx1.26xxF=2.52 F),(Tl^(+)+e^(-) rarr Tl, nFE^(@)=1xx(-0.336)xxF=-0.336F),("Adding"),(bar(Tl^(3+)+3e^(-) rarr Tl, E^(@)=(2.52F-0.336F)/(nF)=2.184/3" ")):}`
`=0.728` volt

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