A liquid-liquid solution is called an ideal solution if
I. it obeys PV = nRT.
II. it obeys Raoult's law.
III. solute-solute, solvent-solvent, and solute-solvent interactions are very similar.
IV. solute-solute, solvent-solvent, and solute-solvent interactions are quite different.
A) II, IV
B) II, III
C) I, II
D) I, II, III
E) I, II, IV

Question

A liquid-liquid solution is called an ideal solution if 
I. it obeys PV = nRT.
II. it obeys Raoult's law.
III. solute-solute, solvent-solvent, and solute-solvent interactions are very similar.
IV. solute-solute, solvent-solvent, and solute-solvent interactions are quite different.
A) II, IV
B) II, III
C) I, II
D) I, II, III
E) I, II, IV

Quizplus · Accepted Answer

An ideal solution must obey Raoult's law (choice II) which states that the vapor pressure of a component in a solution is proportional to its mole fraction. Additionally, solute-solvent, solvent-solvent, and solute-solute interactions in an ideal solution are very similar (choice III). However, it does not necessarily have to obey the ideal gas law (choice I) and in fact, liquid solutions do not necessarily behave as ideal gases. Lastly, choice IV is incorrect as it describes non-ideal solutions.

A Liquid-Liquid Solution Is Called an Ideal Solution If