AP Bio Topic 2.7

What is the primary purpose of understanding water potential?

• To measure the temperature of water.

• To predict the direction of water movement.

• To determine the purity of a water sample.

• To calculate the mass of water molecules.

What effect does the addition of solutes have on the water potential of a solution?

• It increases the water potential.

• It decreases the water potential.

• It causes the water potential to become zero.

• It has no significant effect on water potential.

Water always moves from an area of ______ water potential to an area of ______ water potential.

• low; high

• high; low

• equal; unequal

• negative; positive

Which two components are combined to determine the overall water potential (Ψ) of a system?

• Temperature potential and Gravity potential.

• Kinetic potential and Thermal potential.

• Solute potential and Pressure potential.

• Surface tension potential and Osmotic potential.

If a solution has a solute potential of -5 bars and a pressure potential of 2 bars, what is its overall water potential?

• -7 bars

• -3 bars

• 3 bars

• 7 bars

What is the ionization constant (i) for sodium chloride (NaCl) when it is dissolved in water?

• 0

• 1

• 2

• 3

Which of the following factors is NOT directly used to calculate solute potential (Ψs) using the formula Ψs = -iCRT?

• Ionization constant (i)

• Molar concentration (C)

• Pressure constant (R)

• Pressure potential (Ψp)

A sugar solution in an open beaker has a molar concentration of 0.2 M at 22 degrees Celsius. What is its solute potential?

• -0.2 bars

• -1.0 bars

• -4.9 bars

• -5.0 bars