Formation Constants for Complex Ions

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

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