Which of the following statements is NOT generally true regarding solubility?

Which of the following statements is NOT generally true regarding solubility?

• A. Increasing temperature increases the solubility of a gas in a liquid.
• B. Solubility can depend on pressure for gases.
• C. Solubility generally increases with temperature for solids.
• D. Polar solvents typically dissolve polar solutes.

Answer: (A)

Increasing temperature generally decreases the solubility of a gas in a liquid, which makes this statement not true in the context of solubility principles. The solubility of gases in liquids is inversely related to temperature due to increased kinetic energy at higher temperatures, which causes gas molecules to escape from the liquid phase more readily. On the other hand, the other statements correctly reflect solubility principles. Pressure does influence gas solubility due to the gas laws, particularly Henry’s law, which states that the solubility of a gas is directly proportional to the pressure of that gas above the solution. For solids, increased temperature typically leads to greater solubility as more solute can be dissolved in a solvent. Lastly, the interaction between polar solvents and polar solutes follows the principle of "like dissolves like," meaning that polar substances tend to dissolve well in polar solvents due to similar intermolecular forces.

Increasing temperature generally decreases the solubility of a gas in a liquid, which makes this statement not true in the context of solubility principles. The solubility of gases in liquids is inversely related to temperature due to increased kinetic energy at higher temperatures, which causes gas molecules to escape from the liquid phase more readily.

On the other hand, the other statements correctly reflect solubility principles. Pressure does influence gas solubility due to the gas laws, particularly Henry’s law, which states that the solubility of a gas is directly proportional to the pressure of that gas above the solution. For solids, increased temperature typically leads to greater solubility as more solute can be dissolved in a solvent. Lastly, the interaction between polar solvents and polar solutes follows the principle of "like dissolves like," meaning that polar substances tend to dissolve well in polar solvents due to similar intermolecular forces.