# Is K^+[Pb(OH)_3]^(-) possible? Could the cation be exchanged?

${K}^{+} {\left[P b {\left(O H\right)}_{3}\right]}^{-}$ is the SALT of potassium ion, ${K}^{+}$, and the complex ion, ${\left[P b {\left(O H\right)}_{3}\right]}^{-}$. I do not know whether this ion has been actually isolated and characterized; ${\left[P b {\left(O H\right)}_{4}\right]}^{2 -}$ is better known. In either case, we could potentially exchange the potassium cation for other cations such as $N {a}^{+}$ or $L {i}^{+}$, but probably not for $N {H}_{4}^{+}$, why not?