2NH3 -6e- = N2 + 6H+ | 6 | 6 | 1 |
(FeO4)2- +3e- + 4H2O = Fe(OH)3 + 5OH- | 3 | | 2 |;
2NH3 + 2(FeO4)2- + 8H2O = N2 + 6H+ + 2Fe(OH)3 + 10OH- (образ-ся изб. OH-), далее:
2NH3 + 2(FeO4)2- + 8H2O = N2 + 6H2O + 2Fe(OH)3 + 4OH-;
"сокр-м" воду:
2NH3 + 2(FeO4)2- + 2H2O = N2 + 2Fe(OH)3 + 4OH-;
2NH3 + 2K2FeO4 + 2H2O = N2 + 2Fe(OH)3 + 4KOH.