Which of the solutions shown here will have the lowest vapor pressure? White circles indicate solvent molecules; black circles indicate molecules of a nonvolatile solute.
E)all are equivalent

Question

Quizplus · Accepted Answer

The solution with the lowest vapor pressure is the one with the highest concentration of solute. In this case, solution D has the highest concentration of solute because it has the most black circles relative to white circles. This means that the solute is preventing some solvent molecules from evaporating, thus lowering the vapor pressure. Solutions A, B, and C have lower concentrations of solute and therefore will have higher vapor pressures. Solution E is not the best choice because all solutions are not equivalent in terms of vapor pressure.

Which of the Solutions Shown Here Will Have the Lowest