This question is about complexes of the transition metal iron.
State the meaning of the term transition metal complex.
Fe(PCl3)5Fe(PCl_3)_5Fe(PCl3)5 is a complex of iron that contains molecules of PCl3PCl_3PCl3. The electron pair repulsion theory can be used to predict the shape of a PCl3PCl_3PCl3 molecule. Draw the shape of a PCl3PCl_3PCl3 molecule. Include any lone pairs of electrons that influence the shape. Name the shape.
Suggest why the oxidation state of iron is zero in Fe(PCl3)5Fe(PCl_3)_5Fe(PCl3)5.
The compound [Fe(NH3)4Cl2]Cl[Fe(NH_3)_4Cl_2]Cl[Fe(NH3)4Cl2]Cl contains ammonia molecules. Deduce the oxidation state of iron in [Fe(NH3)4Cl2]Cl[Fe(NH_3)_4Cl_2]Cl[Fe(NH3)4Cl2]Cl.
Name the type of bond between N and H in ammonia.
The compound [Fe(NH3)4Cl2]Cl[Fe(NH_3)_4Cl_2]Cl[Fe(NH3)4Cl2]Cl contains a complex ion that shows isomerism. Draw the two isomers of the complex ion. State the type of isomerism shown.
Complete the equation to show the formation of one complex that contains iron in its +3 oxidation state:
FeCl3+5H2O→ FeCl_3 + 5H_2O \rightarrow FeCl3+5H2O→63 exam-style questions on AQA A Level Chemistry Transition metals (A-level only), covering General properties of transition metals (A-level only), Substitution reactions (A-level only), Shapes of complex ions (A-level only), Formation of coloured ions (A-level only), Variable oxidation states (A-level only), and Catalysts (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.