Chapter 21, Problem 17Q

Interpretation Introduction

Interpretation: The explanations of the fact that compounds of ${\text{Ti}}^{3+}$ and ${\text{V}}^{3+}$ are generally colored, but compounds of ${\text{Sc}}^{3+}$ are not to be stated.

Concept introduction: The metal that has partially filled $\text{d}$ or $\text{f}$ orbital is known as transition metal. These metals are generally colored due to transfer of electrons between split $\text{d}$ orbital.

To explain: The facts that, compounds of ${\text{Ti}}^{3+}$ and ${\text{V}}^{3+}$ are generally colored, but compounds ${\text{Sc}}^{3+}$ are not.