Write the molecular geometry and coordination number for triamminetriaquachromium(lll)chloride.

Answer 1

Triamminetriaquachromium(III) chloride can be represented by the formula \([Cr(NH_3)_3(H_2O)_3]Cl_3\).

1. Molecular Geometry: The chromium ion \(Cr^{3+}\) in this complex ion is surrounded by six ligands (three ammonia molecules and three water molecules). This arrangement leads to an octahedral geometry.

2. Coordination Number: The coordination number is defined as the number of ligand donor atoms that are directly bonded to the central metal ion. In this case, with three \(NH_3\) and three \(H_2O\) ligands, the coordination number is 6.

To summarize:

• Molecular Geometry: Octahedral
• Coordination Number: 6