Question

The secondary valency and the number of hydrogen bonded water molecule(s) in $CuS{O}_4.5H_{2}O$, respectively, are:

• A. 6 and 4
• B. 4 and 1
• C. 5 and 1
• D. 6 and 5

Answer 1

The correct option is B 4 and 1

Answer: (b)
The coordination complex of $CuS{O}_4.5H_{2}O$ is shown below:
Secondary valency is the number of ligands attached to the metal ion. Here, 4 water molecules are coordinated with $Cu$. Hence, number of secondary valency is 4.
Also, there is one hydrogen bonded water molecule.