Question

If each of the following is an ideal solution at 37 °C, the lowest osmotic pressure, equaling 20 atm, is produced by:________

Answer 1

Answer:

The lowest osmotic pressure is produced by the solution with the lowest concentration of solute.

Explanation:

This relation between the osmotic pressure and the concentration of solute was determined by Jacobus Van 't Hoff and follows the formula:

$\Pi = i*c*R*T$

Where:

• $\Pi$ is the osmotic pressure

• i is the Van 't Hoff index
• c is the molar concentration of solute
• R is the ideal gas constant
• T is the temperature

Given that R is a constant and that i and T are the same for all  the solutions, the solution with the lowest c will have the lowest osmotic pressure.