Answer: 3 ions.
- A 3 ions
- B 2 ions
- C 4 ions
- D 5 ions
Correct answer: A. 3 ions
Explanation: The complex cation [Co(NH<sub>3</sub>)<sub>5</sub>Cl]<sup>2+</sup> and two ionisable Cl<sup>-</sup> give a total of 3 ions. This was how Werner determined the number of ionisable groups.
The three common coordination geometries: octahedral (6 ligands), tetrahedral (4 ligands), and square planar (4 ligands in one plane).
Concept context
Study of compounds where a central metal atom is bonded to surrounding ligands. Covers nomenclature, types of isomerism, bonding theories (VBT, CFT), and applications in medicine, photography, and industry.