Question

At 300 K, two solutions of glucose in water of concentration 0.01 M and 0.001 M are separated by semipemeable membrane. Pressure needs to be applied on solution, to prevent osmosis Calculate the magnitude of this applied pressure.

• A. $P=0.111atm$
• B. $P=0.222atm$
• C. $P=0.264atm$
• D. $P=0.528atm$

Answer 1

The correct option is B $P=0.222atm$

The osmotic pressure, $\Pi =CRT=(0.01-0.001)\times 0.08206\times 300=0.222$ atm
Here, $\Pi$ is the osmotic pressure, $C$ is the difference in the concentration of two solutions, $R$ is the ideal gas constant and $T$ is the absolute temperature.