Method Of Preparation Of Diazoniun Salts

To determine the properties of the complexes and , we need to analyze their electronic configurations and types of bonding.

Electronic Configuration of Nickel

The electronic configuration of a Nickel (Ni) atom in its elemental form (atomic number 28) is:

In the formation of complexes, the oxidation state and the nature of ligands influence the electronic configuration.

Analysis of

is a complex where Ni is in the zero oxidation state. Carbon monoxide (CO) is a strong field ligand and causes the pairing of electrons in the 3d subshell.

1. CO, being a strong field ligand, leads to pairing of electrons in the 3d orbital.
2. Resulting electron pairing:
3. With all electrons paired, the complex is diamagnetic.

Analysis of

is a complex where Ni is in the +2 oxidation state.

1. Chloride ion (Cl^-) is a weak field ligand.
2. It does not cause pairing. Thus, Ni²⁺ configuration:
3. With two unpaired electrons, the complex is paramagnetic.

Conclusion

Based on the analysis, the correct property is:

• is diamagnetic.
• is paramagnetic.

Therefore, the correct option is: diamagnetic, paramagnetic.

To find the solubility product constant ( ) for the sparingly soluble salt , we start by understanding its dissociation in water:

From the dissociation, we can write the expression for the solubility product ( ):

Given:

• Concentration of ions =
• Concentration of ions =

Substitute these concentrations into the expression:

Calculate :

Next, calculate :

Since the options are generally rounded, the closest given option is:

Thus, the correct answer is .