D2.3 Water potential

What is the process of dissolving called?

• Dissolution

• Evaporation

• Condensation

• Sublimation

Which type of solution has a higher solute concentration?

• Hypertonic

• Hypotonic

• Isotonic

In a hypertonic solution, water molecules move:

• into the cell

• out of the cell

• equally in and out of the cell

• not at all

What happens to a cell in an isotonic solution?

• The cell shrinks

• The cell swells

• The cell remains the same size

• The cell bursts

The effect of a cell wall on water movement in plant cells is:

• It prevents water from entering the cell.

• It allows water to move freely in and out of the cell.

• It regulates the movement of water into the cell.

• It has no effect on water movement.

What is the purpose of preparing a series of sugar or salt solutions with a range of solute concentrations from 0.0 mol dm⁻³ upwards?

• To determine the solubility limit of the solute

• To observe the effect of concentration on boiling point

• To create a standard curve for concentration analysis

• To test the effect of concentration on reaction rate

How is the percentage change in mass calculated in the experiment?

• By dividing the change in mass by the original mass and multiplying by 100

• By adding the change in mass to the original mass and multiplying by 100

• By subtracting the original mass from the change in mass and multiplying by 100

• By dividing the original mass by the change in mass and multiplying by 100

What is the predicted NaCl concentration at which mass would not change for sweet potato tissue?

• 0.1 M

• 0.2 M

• 0.3 M

• 0.4 M

Which concentration of NaCl is isotonic to the pumpkin tissue?

• 0.9% NaCl

• 0.5% NaCl

• 1.5% NaCl

• 2.0% NaCl

What does the standard deviation indicate in the context of this experiment?

• It measures the average value of the data set.

• It indicates the spread of data points around the mean.

• It shows the maximum and minimum values in the data set.

• It represents the total number of data points.