Question

Find the coordination number of the central metal atom in K₂[FeCl₄].

Answer 1

Complex ion: K₂[FeCl₄]

• Inside the brackets [] is the complex ion: [FeCl₄]²⁻

• Ligands are 4 Cl⁻ ions.

The Coordination Number:

• Each Cl⁻ is a monodentate ligand (donates 1 electron pair).

∴ Coordination Number = 4