The complex that dissolves in water is

$$\begin{gathered} \left[{\mathrm{Fe}}_3{\left(\mathrm{OH}\right)}_2{\left(\mathrm{OAC}\right)}_6\right]\mathrm{Cl}\to \mathrm{Red} \mathrm{colouration} \\ {\mathrm{Fe}}_4{\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}_3\to \mathrm{Prussian} \mathrm{blue} \mathrm{precipitate} \\ {\left({\mathrm{NH}}_4\right)}_3\left[\mathrm{As}{\left({\mathrm{Mo}}_3{\mathrm{O}}_{10}\right)}_4\right]\to \mathrm{Yellow} \mathrm{precipitate} \\ {\mathrm{K}}_3\left[\mathrm{Co}{\left({\mathrm{NO}}_2\right)}_6\right]\to \mathrm{Yellow} \mathrm{precipitate} \end{gathered}$$