Oxidation Numbers 2

Oxidation States

Useful in oxidation-reduction (redox) reactions.

 

Atom	Oxidation 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
	memorize

 

Atom	Oxidation 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
	memorize

Reference

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

 

Oxidation Numbers and Oxidation Numbers 3 give more.