Question

Consult the table of standard electrode potentials and suggest three substances that can oxidise ferrous ions under suitable conditions. 

Answer 1

Substances that are stronger oxidising agents than ferrous ions can oxidise ferrous ions.

Fe²⁺ → Fe³⁺ + e^-1  ;   E^ø =  - 0.77 V

This implies that the substances having higher reduction potentials than +0.77 V can oxidise ferrous ions to ferric ions.

Three substances that can do so are F_2, Cl₂, and O₂.