Fe->FeO->FeSO4->Fe(OH)2->Fe(OH)3->Fe2O3

Question

Fe->FeO->FeSO4->Fe(OH)2->Fe(OH)3->Fe2O3

Answer 1

Fe3+ + H2O = FeOH2+ + H+ pH<7</span>
4Fe(OH)2 + O2 + 2H2O = 4Fe(OH)3
Fe(OH)3 = Fe2O3 + 3 H2O
Fe2O3+3H2=2Fe+3H2O