Skip to main content
Chemistry LibreTexts

12.11: Formation Constants for Complex Ions

  • Page ID
    233065
  • Equilibrium Kf
    {\text{Al}}^{\text{3+}}\text{+}6{\text{F}}^{-}\rightleftharpoons{\left[{\text{AlF}}_{6}\right]}^{\text{3-}} 7\times{10}^{19}
    {\text{Cd}}^{\text{2+}}\text{+}4{\text{NH}}_{3}\rightleftharpoons{\left[\text{Cd}{\left({\text{NH}}_{3}\right)}_{4}\right]}^{\text{2}\text{+}} 1.3\times{10}^{7}
    {\text{Cd}}^{\text{2+}}+4{\text{CN}}^{-}\rightleftharpoons{\left[\text{Cd}{\left(\text{CN}\right)}_{4}\right]}^{2-} 3\times{10}^{18}
    {\text{Co}}^{\text{2+}}+6{\text{NH}}_{3}\rightleftharpoons{\left[\text{Co}{\left({\text{NH}}_{3}\right)}_{6}\right]}^{2+} 1.3\times{10}^{5}
    {\text{Co}}^{\text{3+}}+6{\text{NH}}_{3}\rightleftharpoons{\left[\text{Co}{\left({\text{NH}}_{3}\right)}_{6}\right]}^{\text{3+}} 2.3\times{10}^{33}
    {\text{Cu}}^{+}+2\text{CN}\rightleftharpoons{\left[\text{Cu}{\left(\text{CN}\right)}_{2}\right]}^{-} 1.0\times{10}^{16}
    {\text{Cu}}^{\text{2+}}+4{\text{NH}}_{3}\rightleftharpoons{\left[\text{Cu}{\left({\text{NH}}_{3}\right)}_{4}\right]}^{\text{2+}} 1.7\times{10}^{13}
    {\text{Fe}}^{\text{2+}}+6{\text{CN}}^{-}\rightleftharpoons{\left[\text{Fe}{\left(\text{CN}\right)}_{6}\right]}^{4-} 1.5\times{10}^{35}
    {\text{Fe}}^{\text{3+}}+6{\text{CN}}^{-}\rightleftharpoons{\left[\text{Fe}{\left(\text{CN}\right)}_{6}\right]}^{3-} 2\times{10}^{43}
    {\text{Fe}}^{\text{3+}}+6{\text{SCN}}^{-}\rightleftharpoons{\left[\text{Fe}{\left(\text{SCN}\right)}_{6}\right]}^{3-} 3.2\times{10}^{3}
    {\text{Hg}}^{\text{2+}}+4{\text{Cl}}^{-}\rightleftharpoons{\left[{\text{HgCl}}_{4}\right]}^{2-} 1.1\times{10}^{16}
    {\text{Ni}}^{\text{2+}}+6{\text{NH}}_{3}\rightleftharpoons{\left[\text{Ni}{\left({\text{NH}}_{3}\right)}_{6}\right]}^{\text{2+}} 2.0\times{10}^{8}
    {\text{Ag}}^{+}+2{\text{Cl}}^{-}\rightleftharpoons{\left[{\text{AgCl}}_{2}\right]}^{-} 1.8\times{10}^{5}
    {\text{Ag}}^{+}+2{\text{CN}}^{-}\rightleftharpoons{\left[\text{Ag}{\left(\text{CN}\right)}_{2}\right]}^{-} 1\times{10}^{21}
    {\text{Ag}}^{+}+2{\text{NH}}_{3}\rightleftharpoons{\left[\text{Ag}{\left({\text{NH}}_{3}\right)}_{2}\right]}^{+} 1.7\times{10}^{7}
    {\text{Zn}}^{\text{2+}}+4{\text{CN}}^{-}\rightleftharpoons{\left[\text{Zn}{\left(\text{CN}\right)}_{4}\right]}^{2-} 2.1\times{10}^{19}
    {\text{Zn}}^{\text{2+}}+4{\text{OH}}^{-}\rightleftharpoons{\left[\text{Zn}{\left(\text{OH}\right)}_{4}\right]}^{2-} 2\times{10}^{15}
    {\text{Fe}}^{\text{3+}}+{\text{SCN}}^{-}\rightleftharpoons{\left[\text{Fe}\left(\text{SCN}\right)\right]}^{\text{2+}} 8.9\times{10}^{2}
    {\text{Ag}}^{+}+4{\text{SCN}}^{-}\rightleftharpoons{\left[\text{Ag}{\left(\text{SCN}\right)}_{4}\right]}^{3-} 1.2\times{10}^{10}
    {\text{Pb}}^{\text{2+}}+4{\text{I}}^{-}\rightleftharpoons{\left[{\text{PbI}}_{4}\right]}^{2-} 3.0\times{10}^{4}
    {\text{Pt}}^{\text{2+}}+4{\text{Cl}}^{-}\rightleftharpoons{\left[{\text{PtCl}}_{4}\right]}^{2-} 1\times{10}^{16}
    {\text{Cu}}^{\text{2+}}+4\text{CN}\rightleftharpoons{\left[\text{Cu}{\left(\text{CN}\right)}_{4}\right]}^{2-} 1.0\times{10}^{25}
    {\text{Co}}^{\text{2+}}+4{\text{SCN}}^{-}\rightleftharpoons{\left[\text{Co}{\left(\text{SCN}\right)}_{4}\right]}^{2-} 1\times{10}^{3}
    CC licensed content, Shared previously
    • Was this article helpful?