Chapter 13, Problem 114AP

Iodine $\left({\text{I}}_{\text{2}}\right)$ is only sparingly soluble in water (left photo). Yet upon the addition of iodide ions (e.g., from $\text{KI}$ ). iodine is converted to the triiodide ion, which readily dissolves (right photo):

${\text{I}}_{\text{2}}\text{(}s{\text{)+I}}^{\text{-}}(aq)\rightleftarrows {\text{I}}_3^{-}(aq)$

Describe the change in solubility of I₂ in terms of the change in intermolecular forces.