Chapter 16, Problem 16.10P

Interpretation Introduction

Interpretation:

Reason behind the use of ${\text{I}}_{\text{2}}$ in a solution that contains excess ${\text{I}}^{-}$ has to be explained.

Concept Introduction:

Solubility of a substance is the ability to dissolve in a given solvent. Practically solubility is measured in terms of the amount of species that can be dissolved in a given solvent at equilibrium conditions to make a saturated solution.

The substance with high solubility indicates the lesser number of solute molecules near the surface of the solution, and hence vapor pressure over the solution is low.