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Questions and Answers
What does osmotic pressure measure?
What does osmotic pressure measure?
- Pressure exerted by the movement of water through a semipermeable membrane
- Pressure exerted by the movement of solvent through a semipermeable membrane (correct)
- Pressure exerted by the movement of both solvent and solute through a semipermeable membrane
- Pressure exerted by the movement of solute through a semipermeable membrane
What happens to osmotic pressure with an increase in solute concentration?
What happens to osmotic pressure with an increase in solute concentration?
- Osmotic pressure remains constant
- Osmotic pressure increases (correct)
- Osmotic pressure decreases
- Osmotic pressure becomes unpredictable
What is the unit of measurement for osmotic pressure?
What is the unit of measurement for osmotic pressure?
- Pa (Pascals)
- Torr
- atm (atmospheres)
- mmHg (millimeters of mercury) (correct)
What is the formula to calculate osmotic pressure?
What is the formula to calculate osmotic pressure?
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How does temperature affect osmotic pressure?
How does temperature affect osmotic pressure?
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What is the Van't Hoff factor (i) for a non-electrolyte solute?
What is the Van't Hoff factor (i) for a non-electrolyte solute?
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Study Notes
Osmotic Pressure
- Osmotic pressure measures the pressure required to prevent the flow of water into a solution through a semipermeable membrane.
- As solute concentration increases, osmotic pressure also increases.
- The unit of measurement for osmotic pressure is atmospheres (atm) or pascals (Pa).
Calculating Osmotic Pressure
- The formula to calculate osmotic pressure is: π = iMRT, where π is the osmotic pressure, i is the Van't Hoff factor, M is the molarity of the solution, R is the gas constant, and T is the temperature in Kelvin.
Temperature and Van't Hoff Factor
- Osmotic pressure increases with an increase in temperature.
- For a non-electrolyte solute, the Van't Hoff factor (i) is 1, indicating that the solute does not dissociate in solution.
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