The following three substances have limited solubility in water.
I. AgCl (solid)
II. O₂ (gas)
III. octane, C₈H₁₈ (liquid) Which substance(s) would become more soluble at a higher pressure and a lower temperature ?

Question

Quizplus · Accepted Answer

According to Henry's law, the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. Therefore, higher pressure would increase the solubility of gas. Also, decreasing the temperature of a gas decreases the kinetic energy of the gas molecules, making them more likely to remain in the liquid phase, thus increasing solubility. However, this does not apply to solids or liquids. AgCl (I) is a solid, so its solubility is not affected by pressure or temperature changes. Octane (III) is a nonpolar liquid and is most soluble in nonpolar solvents, but not affected by pressure or temperature changes.

The Following Three Substances Have Limited Solubility in Water