Oxidation Numbers 2


Oxidation States

Useful in oxidation-reduction (redox) reactions.


AtomOxidation State
V in VO2++5
V in VO2++4
V in V3++3
V in V2++2
Cr in CrCl2, CrBr2, CrI2, CrF2+2
Cr in CrCl3, CrBr3, CrI3, CrF3+3
Cr in Cr2O3+3
Cr in Cr(OH)3+3
Cr in K2Cr2O7+6
Cr in Na2CrO4+6
Cr in CrO3+6
Cr in Cr2O72-+6
Cr in CrO42-+6
Mn in Mn(OH)2+2
Mn in MnS+2
Mn in MnSO4+2
Mn in MnCl2+2
Mn in MnO2+4
Mn in KMnO4+7
Fe in FeO, FeS+2
Fe in FeSO4∙7H2O+2
Fe in K4Fe(CN)6+2
Fe in FeCl3+3
Fe in Fe2O3+3
Fe in K3Fe(CN)6+3
Fe in Fe(SCN)3+3


AtomOxidation State
Co in COSO4+2
Co in [Co(H2O)6]Cl2+2
Co in Co(H2O)6](NO3)2+2
Co in CoS, CoO+2
Co in CoF3+3
Co in Co2O3+3
Co in K3[Co(CN)6]+3
Co in [Co(NH3)6]Cl3+3
Ni in NiCl2 +2
Ni in NiO, NiS+2
Ni in [Ni(H2O)6]Cl2+2
Ni in [Ni(H2O)6]SO4+2
Ni in [Ni(NH3)6](NO3)2+2
Cu in Cu2O+1
Cu in Cu2S+1
Cu in CuCl+1
Cu in CuO+2
Cu in CuSO4∙5H2O+2
Cu in CuCl2∙2H2O+2
Cu in [Cu(H2O)6](NO3)2+2


Chemistry by Steven S. Zumdahl, D.C. Heath and Company, 1986.


Oxidation Numbers and Oxidation Numbers 3 give more.