Определи химических реакций по реакции уравнения!
Fe(OH)2 → FeO + H2O .............................................................................................................................................................
Fe + 2HCl → FeCl2 + H2 ...........................................................................................................................................................
FeO + SO3 → FeSO4 ...................................................................................................................................................................
2NaOH + FeCl2 → Fe(OH)2 + 2NaCl ....................................