Year 11 ATAR Human Biology Osmosis Investigation

Courtesy of KingInBlack.

If the concentration of the external glucose solution is increased, the dialysis tubing filled with distilled water will __________ due to osmosis.

lose more mass

The independent variable in the Osmosis Investigation is __________.

The concentration of the external glucose solution

The dependent variable in the Osmosis Investigation is __________.

The percentage change in mass of the dialysis tubing contents

To calculate the percentage mass change, use the formula __________.

% mass change = (final mass – initial mass) / initial mass × 100

A controlled variable in this experiment is the __________ of solution inside dialysis tubing.

Volume of solution inside dialysis tubing

The __________ of the external glucose solution includes values like 0.0 M, 0.3 M, 0.6 M, and 0.9 M.

External Solution

If the external concentration is high, the % change in mass will tend to be __________.

negative

Osmosis is the net movement of water molecules from a region of higher water potential to a region of __________ solute concentration.

lower

Dialysis tubing acts as a __________ membrane, allowing water to pass but restricting larger solute molecules.

semipermeable

One potential problem with the experiment could be __________ of the dialysis tubing, affecting mass measurements.

Incomplete sealing

To improve the validity of the experiment, you should conduct __________ trials for each concentration.

multiple

A graph representing the experiment should have __________ on the x-axis and % change in mass on the y-axis.

Concentration of external solution

Based on typical results, the hypothesis was __________ as the external glucose concentration increased, the mass of the dialysis tubing decreased.

supported