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Questions and Answers
If a cell is placed in a solution with a higher solute concentration than the cell's internal environment, what will happen to the cell?
If a cell is placed in a solution with a higher solute concentration than the cell's internal environment, what will happen to the cell?
Which of the following statements correctly describes the relationship between solute concentration and water potential?
Which of the following statements correctly describes the relationship between solute concentration and water potential?
A plant cell is placed in a solution with a water potential of -0.5 MPa. The cell's internal water potential is -0.8 MPa. In which direction will water move?
A plant cell is placed in a solution with a water potential of -0.5 MPa. The cell's internal water potential is -0.8 MPa. In which direction will water move?
What is the osmotic pressure of a solution containing 0.2 moles of a non-dissociating solute in 1 liter of water at 25°C?
What is the osmotic pressure of a solution containing 0.2 moles of a non-dissociating solute in 1 liter of water at 25°C?
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Which of the following scenarios would result in a negative pressure potential?
Which of the following scenarios would result in a negative pressure potential?
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Study Notes
Movement of Water
- Osmosis is a passive form of diffusion
- Water moves from high to low concentration
- Water moves across cell membranes
- Osmosis is driven by the difference in water potential between two areas
- Water moves to equalize the concentration of solutes
Types of Solutions
- Hypotonic solution: Contains a lower concentration of solutes compared to the inside of a cell. Water will move into the cell, causing it to swell.
- Hypertonic solution: Contains a higher concentration of solutes compared to the inside of a cell. Water will move out of the cell, causing it to shrink.
- Isotonic solution: Contains the same concentration of solutes as the inside of a cell. Water moves in and out at equal rates, maintaining cell shape.
Water Potential
- Water potential is the tendency of water to move from one area to another.
- Water potential is affected by solute concentration and pressure.
- Pure water has a water potential of zero.
- Adding solutes lowers water potential.
- Pressure increases water potential.
- The water potential equation: Ψ = Ψs + Ψp
- Ψ = water potential
- Ψs = solute potential
- Ψp = pressure potential
Ideal Gas Law & Osmosis Relationships
- Ideal gas law: π = iCRT
- π = osmotic pressure
- i = ionization constant
- C = concentration
- R = ideal gas constant
- T = temperature.
- Zero pressure is only for closed systems. Open systems have zero pressure.
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Description
Explore the principles of osmosis and water potential in this quiz. Understand how water moves across cell membranes and the effects of different types of solutions on cells. Test your knowledge of hypotonic, hypertonic, and isotonic solutions.
