1.16.3.2 2 Fe(II) + H2O2 + 2 H2O = 2 [FeO(OH)] + 4 H+ (1b) - 1.16.3.2 2 Fe(II) + O2 + 4 H2O = 2 [FeO(OH)] + 4 H+ + H2O2 (1a) - 1.16.3.2 4 Fe(II) + O2 + 6 H2O = 4 [FeO(OH)] + 8 H+ overall reaction -