Explain what a transition metal and a bidentate ligand are, and discuss the hydrated complex [ extCu( extH2 extO)6]2+.

Here are the solutions to the questions:

4. (a) Transition metals form complexes by combining with ligands. What is

• (i) A transition metal? A transition metal is an element that has a partially filled d subshell in its atomic state or in one or more of its common oxidation states.

• (ii) A bidentate ligand? A bidentate ligand is a ligand that can form two coordinate bonds to a single central metal ion, as it possesses two donor atoms.

4. (b) Copper forms the hydrated complex, $[\text{Cu}(\text{H}_2\text{O})_6]^{2+}$
The question for part (b) is incomplete. Please provide the full question for me to solve it.