Aerial oxidation gradually changes `Fe^(2+)` ions to `Fe^(3+)` ions. Which of the following should be added to `Fe^(2+)` ions to prevent this from happening?
Use `E_(Fe^(3+)//Fe^(2-))^(@) = +0.771 V, E_(Cu^(2+)//Cu)^(@) = +0.34 V.`
`E_(Mg^(2+)//Mg = -2.37 V`

Explanation

No because for the reaction , `Fe^(3+) + Br^(-) to Fe^(2+) + (1)/(2)Br_(2)`
`E^(Theta) = 0.771 - 1.09 = -0.319 V` is negative .