Questions: What is the relationship of osmotic pressure to the number of solute particles in a solution? Multiple Choice The lower the number of impermeant solute particles, the greater the osmotic pressure. The greater the osmotic pressure, the lower the number of impermeant solute particles. The greater the number of impermeant solute particles, the lower the osmotic pressure.

Solution Steps

Osmotic pressure is the pressure required to stop the flow of solvent molecules through a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration. It is directly related to the number of solute particles in the solution.

The osmotic pressure (\(\Pi\)) of a solution can be described by the formula: \[ \Pi = iMRT \] where:

• \(i\) is the van 't Hoff factor (number of particles the solute dissociates into),
• \(M\) is the molarity of the solution,
• \(R\) is the gas constant,
• \(T\) is the temperature in Kelvin.

• Option 1: "The lower the number of impermeant solute particles, the greater the osmotic pressure." This is incorrect because osmotic pressure increases with the number of solute particles.
• Option 2: "The greater the osmotic pressure, the lower the number of impermeant solute particles." This is incorrect because greater osmotic pressure corresponds to a higher number of solute particles.
• Option 3: "The greater the number of impermeant solute particles, the lower the osmotic pressure." This is incorrect because a greater number of solute particles results in higher osmotic pressure.

Final Answer