ACS Physical Chemistry Thermochemistry Practice Test 2025 - Complete Exam Prep

An ideal-dilute solution is characterized by specific behavior of its components, particularly when considering the laws governing their interactions. In such a solution, the solute tends to be present in relatively low concentrations, which allows us to apply certain laws more effectively.

The correct understanding is that in an ideal-dilute solution, the solute behaves in accordance with Henry's law. This law states that the concentration of a gas in a liquid is proportional to the pressure of that gas above the liquid, which applies well when the solute is at low concentrations. Simultaneously, the solvent behaves according to Raoult's law, which indicates that the partial vapor pressure of each component in a solution is directly related to its mole fraction in the mixture.

In this context, the combination of Henry's law for the solute and Raoult's law for the solvent accurately reflects the behavior of components in an ideal-dilute solution, thus making this choice the correct representation.