Fe-FeCI2-Fe(NO3)4-Fe(OH)2-FeO-Fe

Fe + 2HCl = FeCl2 + H2FeCl2 + 2AgNO3 = Fe(NO3)2 + 2AgClFe(NO3)2 + Ba(OH)2 = Ba(NO3)2 + Fe(OH)2Fe(OH)2 (t)= FeO + H2OFeO + C (t)= Fe + CO