In osmosis:
A)Knowing the osmotic pressure can help determine the molar mass of a solute dissolved in a solvent.
B)The semipermeable membrane is used to change the freezing and melting points of a solution.
C)Solutions cannot have identical osmotic pressures.
D)Temperature does not affect the osmotic pressure of a solution.
E)At least two of the above statements are correct.

Question

Quizplus · Accepted Answer

Osmotic pressure is directly proportional to the concentration of the solute and inversely proportional to the molar mass of the solute. Therefore, if the osmotic pressure is known, it can help determine the molar mass of the solute using the equation: π = MRT, where π is the osmotic pressure, M is the molarity of the solution, R is the gas constant, and T is the temperature in Kelvin.

B, C, and D are incorrect statements. The semipermeable membrane is used to selectively allow the passage of solvent molecules and restrict the passage of solute molecules, and it does not affect the freezing or melting points of a solution. Solutions can have identical osmotic pressures if they have the same concentration of solute and temperature. Temperature affects the osmotic pressure because it affects the rate of diffusion of the solvent molecules through the membrane.

In Osmosis