Chapter 21, Problem 86AE

(a)

Interpretation Introduction

Interpretation:

The $\text{pH}$ of cobalt complex with given concentration, greater $\text{pH}$ between cobalt complexes, The number of unpaired electrons in low-spin or high-spin of cobalt complexes have to be determined.

Concept introduction:

• $\text{pH}$ is the logarithm of the reciprocal of the concentration  of ${\text{H}}_{\text{3}}{\text{O}}^{\text{+}}$  in a solution.
•   $\text{pH}$ is used to determine the acidity of an aqueous solution.
• $\text{pOH}=-\log \left[{\text{OH}}^{-}\right]$
• The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.

To calculate: The $\text{pH}$ of ${\text{[Co(H}}_{\text{2}}{\text{O)}}_{\text{6}}{\text{]Cl}}_{\text{3}}$.

(b)

Interpretation Introduction

Interpretation:

The $\text{pH}$ of cobalt complex with given concentration, greater $\text{pH}$ between cobalt complexes, The number of unpaired electrons in low-spin or high-spin of cobalt complexes have to be determined.

Concept introduction:

• $\text{pH}$ is the logarithm of the reciprocal of the concentration  of ${\text{H}}_{\text{3}}{\text{O}}^{\text{+}}$  in a solution.
•   $\text{pH}$ is used to determine the acidity of an aqueous solution.
• $\text{pOH}=-\log \left[{\text{OH}}^{-}\right]$
• The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.

To determine: The higher $\text{pH}$ between cobalt complexes.

(c)

Interpretation Introduction

Interpretation:

The $\text{pH}$ of cobalt complex with given concentration, greater $\text{pH}$ between cobalt complexes, The number of unpaired electrons in low-spin or high-spin of cobalt complexes have to be determined.

Concept introduction:

• $\text{pH}$ is the logarithm of the reciprocal of the concentration  of ${\text{H}}_{\text{3}}{\text{O}}^{\text{+}}$  in a solution.
•   $\text{pH}$ is used to determine the acidity of an aqueous solution.
• $\text{pOH}=-\log \left[{\text{OH}}^{-}\right]$
• The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.

To determine: The number of unpaired electrons in low-spin or high-spin of cobalt complexes.