Which graph best describes how the vapor pressure of a solution varies according to Raoult's law as a nonvolatile solute is added to a liquid? The vapor pressure of the solution is plotted on the y-axis, and the mole fraction of solute is plotted on the x-axis. The origin (0, 0) is not necessarily located where the axes cross.
A) I
B) II
C) III
D) IV

Question

Which graph best describes how the vapor pressure of a solution varies according to Raoult's law as a nonvolatile solute is added to a liquid? The vapor pressure of the solution is plotted on the y-axis, and the mole fraction of solute is plotted on the x-axis. The origin (0, 0) is not necessarily located where the axes cross. 
A) I 
B) II 
C) III 
D) IV

Quizplus · Accepted Answer

According to Raoult's law, the vapor pressure of a solution decreases as the mole fraction of solute increases. This relationship is linear, as shown in Graph II. Graphs I, III, and IV do not follow this linear relationship.

Which Graph Best Describes How the Vapor Pressure of a Solution