Changing of iron(II) ions to iron(III) ions and vice versaIron exhibits two oxidation numbers (a) +2 as iron(II) ion, Fe2+ (b) +3 as iron(III) ion, Fe3+ An aqueous solution containing iron(II) ions, Fe2+ is pale green in colour, whereas that containing iron(III) ions, Fe3+ is yellow/yellowish-brown/ brown in colour. Changing iron(II) ions to iron(III) ions is an … [Read more...] about Changing of iron(II) ions to iron(III) ions and vice versa