WAEC - Chemistry (2020 - No. 5)
What quantity of electrons is lost when one mole of iron (II) ions is oxidized to iron (III) ?
0 mole
3 moles
I mole
2 moles
Explication
Fe\(^2^+\) → Fe\(^3^+\)
The pale green Fe2+ is oxidized to orange Fe3+ because it loses an electron.