REVIEW EXERCISES

For the complex $\left[\mathrm{Fe}{\left(\mathrm{en}\right)}_2{\mathrm{Cl}}_2\right]\mathrm{Cl}$, (en = ethylenediamine), identify the oxidation number of iron.

What do you understand by the stability constant, ${\mathrm{K}}_{\mathrm{s}}$ of a complex. Knowing that the value of ${\mathrm{K}}_{\mathrm{s}}$ for ${\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$ is $4.5\times {10}^{11}$ and for ${\left[\mathrm{Cu}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ is $2.0\times {10}^{27}$. Suggest (a) which complex species will furnish less ${\mathrm{Cu}}^{2+}$ ions in the solution. (b) which out of $\left({\mathrm{NH}}_3\right)$ and $\left({\mathrm{CN}}^{-}\right)$ is a stronger base?

What is an ambidentate group?

Select a complex formation reaction and write an expression for the stability constant of the complex species. What information is conveyed regarding the strength of ligands from the stability constant values of their complexes with a metal ion? Illustrate your answer with examples of monodentate ligands.

Give the application of coordination compounds in life processes.

Give the application of coordination compounds in analytical chemistry.

Give the application of coordination compounds in metallurgy.

Give the application of coordination compounds in photography.