Water Potential

What does water potential represent?

• The kinetic energy of water molecules.

• The potential energy of water per unit area compared to pure water.

• The rate at which water evaporates from a surface.

• The amount of dissolved solutes in water.

In which direction does water always move?

• From an area of low water potential to an area of high water potential.

• From an area of high water potential to an area of low water potential.

• Towards the highest concentration of solutes.

• Away from the highest concentration of solutes.

What are the two main components that determine the overall water potential (Ψ) of a system?

• Osmotic potential and gravitational potential.

• Kinetic energy and thermal energy.

• Solute potential and pressure potential.

• Surface tension and adhesion.

What effect does increasing the number of solutes in an area have on the solute potential?

• It increases the solute potential.

• It decreases the solute potential.

• It has no effect on the solute potential.

• It only affects pressure potential, not solute potential.

What is the overall water potential if the solute potential is -5 bars and the pressure potential is 2 bars?

• -7 bars

• -3 bars

• 3 bars

• 7 bars

What is the ionization constant (i) for sucrose when calculating solute potential?

• 0

• 1

• 2

• It varies depending on concentration.

How should temperature be expressed when calculating solute potential using the formula Ψs = -iCRT?

• In Celsius degrees

• In Fahrenheit degrees

• In Kelvin, by adding 273 to the Celsius temperature

• In Kelvin, by subtracting 273 from the Celsius temperature

A sugar solution in an open beaker has a solute potential of -5 bars. What is the overall water potential of this solution?

• 0 bars

• -5 bars

• 5 bars

• -10 bars