Find$\left[{\mathrm{Cu}}^{2+}\right]$in a solution saturated with ${\mathbf{Cu}}_{\mathbf{4}}{\mathbf{\left(}\mathbf{OH}\mathbf{\right)}}_{\mathbf{6}}\mathbf{\left(}{\mathbf{so}}_{\mathbf{4}}\mathbf{\right)}$ if $\left[{\mathrm{OH}}^{-}\right]$ is fixed at $\mathbf{1}\mathbf{.}\mathbf{0}\mathbf{\times }{\mathbf{10}}^{\mathbf{-}\mathbf{6}}\mathbf{M}$ . Note that ${\mathbf{Cu}}_{\mathbf{4}}{\mathbf{\left(}\mathbf{OH}\mathbf{\right)}}_{\mathbf{6}}\mathbf{\left(}{\mathbf{so}}_{\mathbf{4}}\mathbf{\right)}$gives 1mol of ${\mathbf{SO}}_{\mathbf{4}}^{\mathbf{2}\mathbf{-}}$4 mol for of ${\mathbf{Cu}}^{\mathbf{2}\mathbf{+}}$.

$$\begin{gathered} {\mathbf{Cu}}_{\mathbf{4}}{\mathbf{\left(}\mathbf{OH}\mathbf{\right)}}_{\mathbf{6}}\mathbf{\left(}{\mathbf{so}}_{\mathbf{4}}\mathbf{\right)}\left(s\right)\mathbf{\leftrightharpoons }\mathbf{4}\mathit{C}{\mathit{u}}^{\mathbf{2}\mathbf{+}}\mathbf{+}\mathbf{6}\mathit{O}{\mathit{H}}^{\mathbf{-}}\mathbf{+}\mathit{S}{\mathit{O}}_{\mathbf{4}}^{\mathbf{2}\mathbf{-}} \\ {\mathit{K}}_{\mathbf{s}\mathbf{p}}\mathbf{=}\mathbf{2}\mathbf{.}\mathbf{3}\mathbf{\times }{\mathbf{10}}^{\mathbf{-}\mathbf{69}} \end{gathered}$$

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