The Coordination Number of Copper in the Complex Formed by Adding Excess of NH3 to CuSO4 Solution

- When excess ammonia (NH3) is added to a solution of copper sulfate (CuSO4), a complex is formed. In this complex, the copper ion (Cu2+) coordinates with ammonia molecules to form a coordination compound.

Definition of Coordination Number
- The coordination number refers to the number of ligands (atoms, ions, or molecules) that surround a central metal ion in a coordination compound. It represents the number of bonds formed between the ligands and the central metal ion.

Explanation
- In the complex formed by adding excess NH3 to CuSO4 solution, the copper ion (Cu2+) acts as the central metal ion, and ammonia molecules (NH3) act as the ligands.
- The coordination number of copper in this complex can be determined by counting the number of ammonia molecules that are bonded to the copper ion.

Coordination Number of Copper in the Complex
- In the complex formed by adding excess NH3 to CuSO4 solution, the coordination number of copper is 4.
- This can be explained by the fact that the copper ion (Cu2+) in the complex is surrounded by four ammonia molecules, each forming a coordinate bond with the copper ion.
- The coordination number of 4 indicates that four ammonia molecules are directly bonded to the copper ion.

Key Points:
- The coordination number of copper in the complex formed by adding excess NH3 to CuSO4 solution is 4.
- The coordination number represents the number of ligands bonded to the central metal ion in a coordination compound.
- In this complex, the ligands are ammonia molecules (NH3), and the central metal ion is the copper ion (Cu2+).
- The coordination number of 4 indicates that four ammonia molecules are bonded to the copper ion.