Fe + CuSO4 -> FeSO4 + Cu
Fe(0) + Cu(+2)S(+6)O(-2) -> Fe(+2)S(+6)O(-2) + Cu(0)
Zn + FeSO4 -> ZnSO4 + Fe
Zn(0) + Fe(+2)S(+6)O(-2) -> Zn(+2)S(+6)O(-2) + Fe(0)
Fe + CuSO4 -> FeSO4 + Cu
Fe(0) + Cu(+2)S(+6)O(-2) -> Fe(+2)S(+6)O(-2) + Cu(0)
Zn + FeSO4 -> ZnSO4 + Fe
Zn(0) + Fe(+2)S(+6)O(-2) -> Zn(+2)S(+6)O(-2) + Fe(0)