Appendix: Formation Constants for Complex Ions

Formation Constants for Complex Ions

EquilibriumKf
Al3++6F[AlF6]37 × 1019
Cd2++4NH3[Cd(NH3)4]2+1.3 × 107
Cd2++4CN[Cd(CN)4]23 × 1018
Co2++6NH3[Co(NH3)6]2+1.3 × 105
Co3++6NH3[Co(NH3)6]3+2.3 × 1033
Cu++2CN[Cu(CN)2]1.0 × 1016
Cu2++4NH3[Cu(NH3)4]2+1.7 × 1013
Fe2++6CN[Fe(CN)6]41.5 × 1035
Fe3++6CN[Fe(CN)6]32 × 1043
Fe3++6SCN[Fe(SCN)6]33.2 × 103
Hg2++4Cl[HgCl4]21.1 × 1016
Ni2++6NH3[Ni(NH3)6]2+2.0 × 108
Ag++2Cl[AgCl2]1.8 × 105
Ag++2CN[Ag(CN)2]1 × 1021
Ag++2NH3[Ag(NH3)2]+1.7 × 107
Zn2++4CN[Zn(CN)4]22.1 × 1019
Zn2++4OH[Zn(OH)4]22 × 1015
Fe3++SCN[Fe(SCN)]2+8.9 × 102
Ag++4SCN[Ag(SCN)4]31.2 × 1010
Pb2++4I[PbI4]23.0 × 104
Pt2++4Cl[PtCl4]21 × 1016
Cu2++4CN[Cu(CN)4]21.0 × 1025
Co2++4SCN[Co(SCN)4]21 × 103