Appendix K: Formation Constants for Complex Ions

J. Hollett; D. Latimer; D. Vanderwel

Appendix K: Formation Constants for Complex Ions

Formation Constants for Complex Ions
Equilibrium	K_f
${\text{Al}}^{\text{3+}}+6{\text{F}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[{\text{AlF}}_{6}\right]}^{\text{3-}}$	7 $\times$ 10¹⁹
${\text{Cd}}^{\text{2+}}+4{\text{NH}}_{\text{3}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Cd}{\left({\text{NH}}_{3}\right)}_{4}\right]}^{\text{2}\text{+}}$	1.3 $\times$ 10⁷
${\text{Cd}}^{\text{2+}}+4{\text{CN}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Cd}{\left(\text{CN}\right)}_{4}\right]}^{2-}$	3 $\times$ 10¹⁸
${\text{Co}}^{\text{2+}}+6{\text{NH}}_{\text{3}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Co}{\left({\text{NH}}_{3}\right)}_{6}\right]}^{2+}$	1.3 $\times$ 10⁵
${\text{Co}}^{\text{3+}}+6{\text{NH}}_{\text{3}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Co}{\left({\text{NH}}_{3}\right)}_{6}\right]}^{3+}$	2.3 $\times$ 10³³
${\text{Cu}}^{+}+2\text{CN}^{-}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Cu}{\left(\text{CN}\right)}_{2}\right]}^{-}$	1.0 $\times$ 10¹⁶
${\text{Cu}}^{\text{2+}}+4{\text{NH}}_{\text{3}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Cu}{\left({\text{NH}}_{3}\right)}_{4}\right]}^{2+}$	1.7 $\times$ 10¹³
${\text{Fe}}^{\text{2+}}+6{\text{CN}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Fe}{\left(\text{CN}\right)}_{6}\right]}^{4-}$	1.5 $\times$ 10³⁵
${\text{Fe}}^{\text{3+}}+6{\text{CN}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Fe}{\left(\text{CN}\right)}_{6}\right]}^{3-}$	2 $\times$ 10⁴³
${\text{Fe}}^{\text{3+}}+6{\text{SCN}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Fe}{\left(\text{SCN}\right)}_{6}\right]}^{3-}$	3.2 $\times$ 10³
${\text{Hg}}^{\text{2+}}+4{\text{Cl}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[{\text{HgCl}}_{4}\right]}^{2-}$	1.1 $\times$ 10¹⁶
${\text{Ni}}^{\text{2+}}+6{\text{NH}}_{\text{3}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Ni}{\left({\text{NH}}_{3}\right)}_{6}\right]}^{2+}$	2.0 $\times$ 10⁸
${\text{Ag}}^{\text{+}}+2{\text{Cl}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[{\text{AgCl}}_{2}\right]}^{-}$	1.8 $\times$ 10⁵
${\text{Ag}}^{\text{+}}+2{\text{CN}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Ag}{\left(\text{CN}\right)}_{2}\right]}^{-}$	1 $\times$ 10²¹
${\text{Ag}}^{\text{+}}+2{\text{NH}}_{\text{3}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Ag}{\left({\text{NH}}_{3}\right)}_{2}\right]}^{+}$	1.7 $\times$ 10⁷
${\text{Zn}}^{\text{2+}}+4{\text{CN}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Zn}{\left(\text{CN}\right)}_{4}\right]}^{2-}$	2.1 $\times$ 10¹⁹
${\text{Zn}}^{\text{2+}}+4{\text{OH}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Zn}{\left(\text{OH}\right)}_{4}\right]}^{2-}$	2 $\times$ 10¹⁵
${\text{Fe}}^{\text{3+}}+{\text{SCN}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Fe}\left(\text{SCN}\right)\right]}^{2+}$	8.9 $\times$ 10²
${\text{Ag}}^{\text{+}}+4{\text{SCN}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Ag}{\left(\text{SCN}\right)}_{4}\right]}^{3-}$	1.2 $\times$ 10¹⁰
${\text{Pb}}^{\text{2+}}+4{\text{I}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[{\text{PbI}}_{4}\right]}^{2-}$	3.0 $\times$ 10⁴
${\text{Pt}}^{\text{2+}}+4{\text{Cl}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[{\text{PtCl}}_{4}\right]}^{2-}$	1 $\times$ 10¹⁶
${\text{Cu}}^{\text{2+}}+4\text{CN}^{-}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Cu}{\left(\text{CN}\right)}_{4}\right]}^{2-}$	1.0 $\times$ 10²⁵
${\text{Co}}^{\text{2+}}+4{\text{SCN}}^{\text{-}}\phantom{\rule{0.2em}{0ex}}\rightleftharpoons\phantom{\rule{0.2em}{0ex}}{\left[\text{Co}{\left(\text{SCN}\right)}_{4}\right]}^{2-}$	1 $\times$ 10³