Required Practical: Osmosis (AQA GCSE Biology Combined Science): Flashcards

Investigate effect of sugar concentration on potato mass

To ensure potato cylinders are uniform size

24 hours

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

Equal water potential between solution and potato

Hypotonic solution - water moved into potato cells

Hypertonic solution - water moved out of potato cells

Isotonic solution - equal concentration inside and outside

Water movement across selectively permeable membrane from higher to lower water potential

From higher to lower water potential