4Fe⁺²O+4NaOH+O₂⁰ = 4NaFe⁺³O₂⁻²+2H₂OFe₂²⁺- e⁻ = Fe³⁺ | 4 восстановитель, процесс окисленияO₂⁰ + 4e⁻ = 2O²⁻ | 1 окислитель, процесс восстановленияNaFeO2 + 4HCl = FeCl3 + NaCl + 2H2ONa⁺+FeO₂⁻+4H⁺+4Cl⁻=Fe³⁺+3Cl⁻+Na⁺+Cl⁻+2H₂OFeO₂⁻+4H⁺=Fe³⁺+2H₂OFeCl3 + 3NaOH = Fe(OH)3↓ + 3NaClFe³⁺+3Cl⁻+3Na⁺+3OH⁻=Fe(OH)₃↓+3Na⁺+3Cl⁻Fe³⁺+3OH⁻=Fe(OH)₃↓Fe(OH)3 + 3KOH = K3FeO3 + 3H2O3H⁺+FeO₃³⁻+3K⁺+3OH⁻=3K⁺+FeO₃³⁻+3H₂O3H⁺+3OH⁻=3H₂OH⁺+OH⁻=H₂O2K3FeO3 + 6H2SO4 = Fe2(SO4)3 + 3K2SO4 + 6H2O6K⁺+2FeO₃³⁻+12H⁺+6SO₄²⁻=2Fe³⁺+3SO₄²⁻+6K⁺+3SO₄²⁻+6H₂O2FeO₃³⁻+12H⁺=2Fe³⁺+6H₂OFeO₃²⁻+6H⁺=Fe³⁺+3H₂O2Fe2(SO4)3 =t°900÷1000°C⇒2Fe2O3 + 6SO2↑ + 3O2↑Fe2O3 + 3H2SO4 = Fe2(SO4)3 + 3H2OFe2(SO4)3 + 2K4[Fe(CN)6] = 2KFe[Fe(CN)6]↓+3K2SO42Fe³⁺+3SO₄²⁻+8K⁺+[Fe(CN)₆]⁴⁻=2KFe[Fe(CN)₆]↓+6K⁺+3SO₄²⁻2Fe³⁺+2K⁺+[Fe(CN)₆] = 2KFe[Fe(CN)₆]↓