Question

The coordination number and oxidation number of X in [X(SO₄)(NH₃)₅]Cl are ______.

Options

• 10 and 3

• 2 and 6

• 6 and 3

• 6 and 4

Answer 1

The coordination number and oxidation number of X in [X(SO₄)(NH₃)₅]Cl are 6 and 3.

Explanation:

In the complex [X(SO₄)(NH₃)₅]Cl:

• Coordination Number: The central metal X is coordinated to 5 NH₃ ligands and 1 \[\ce{SO^{2-}_4}\] ligand, so the coordination number is 6.
• Oxidation Number: The total charge on the complex is neutral. The \[\ce{SO^{2-}_4}\] ligand has a charge of −2, and NH₃ is neutral. Therefore, the oxidation number of X is +3.

Thus, X has a coordination number of 6 and an oxidation number of 3.