Write the coordination number and geometry for sodium tetrachloronickelate(ll).

Answer 1

Sodium tetrachloronickelate(II) has the chemical formula \( \text{Na}_2[\text{NiCl}_4] \). In this complex, the nickel (Ni) center is surrounded by four chloride (Cl) ions.

Coordination Number: The coordination number of the nickel ion in sodium tetrachloronickelate(II) is 4.

Geometry: The geometry of this complex is square planar, which is typical for nickel(II) complexes with four ligands.

So, to summarize:

• Coordination Number: 4
• Geometry: Square planar