Required Practical: Osmosis (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards

Effect of sugar solution conc. on potato cell mass

Osmosis

Cork borer

0.0 M to 1.0 M in 0.2 M steps

24 hours

$\text{Change in Mass} = \text{Final Mass} - \text{Initial Mass}$

$\frac{\text{Change in Mass}}{\text{Initial Mass}} \times 100$

Same water potential (internal & external)

Hypotonic (lower conc. than cell sap)

Hypertonic (higher conc. than cell sap)

Isotonic (equal conc. to potato cells)

Selectively permeable membrane

From higher to lower water potential

To remove excess surface liquid

% change in mass vs sugar conc.