Choose the aqueous solution with the highest vapor pressure.These are all solutions of nonvolatile solutes and you should assume ideal van't Hoff factors where applicable. A) 0.50 m C₄H₁₀O₄ B) 0.50 m C₂H₆O₂ C) 0.50 m C₇H₁₆O₇ D) 0.50 m C₁₁H₂₄O₁₁ E) They all have about the same vapor pressure.

Question

Quizplus · Accepted Answer

Since all of the solutions are of nonvolatile solutes, their vapor pressures will depend only on the concentration of the solution, as determined by Raoult's law. Therefore, the vapor pressures of all the solutions will be proportional to their mole fractions of solvent, which is close to 1 for all of them (since the solutes are nonvolatile). Therefore, the vapor pressures of all the solutions will be approximately the same, and the correct answer is E.

Choose the Aqueous Solution with the Highest Vapor Pressure