Question

If `E_(fe^(2+)//Fe)^(@)` is `x_(1),E_(Fe^(3+)//Fe)^(@), is `x_(2)` then what will be `E_(Fe^(3+)//Fe^(2+))^(@)`

Answer 1

Correct Answer - `3x_(2)-2x_(1)`
`FetoFe^(2+)+2e^(-),-x`, (i). `" "triangleG_(1)^(@)=-(-2Fx_(1))`
`Fe^(3+)+3e^(-)toFe,x_(2)` …(ii). `" "triangleG_(2)^(@)=-3Fx_(2)`
`Fe^(3+)+e^(-)toFe^(2+)` ….(ii). `" "triangleG_(3)^(@)=-FE^(@)`
Equation (iii) `=eq`. `(1)+eq.(ii)`
`E_(Fe^(3+)//Fe^(2+))^(@)=3x_(2)-2x_(1)`
`-FE^(@)=-(-2Fx_(1))+-3Fx_(2)`
`E_(Fe^(3+)//Fe^(2+))^(@)=3x_(2)-2x_(1)`