Required Practical: Osmosis (AQA GCSE Biology): Flashcards

Investigate effect of sugar solution concentration on potato mass

Cork borer

To ensure uniform size

24 hours

To remove excess surface liquid

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

$\left(\frac{\text{Change in Mass}}{\text{Initial Mass}}\right) \times 100$

Equal water potential (isotonic point)

Hypotonic (lower concentration outside)

Hypertonic (higher concentration outside)

Isotonic (equal concentrations)

Selectively permeable membrane

Higher to lower water potential

How cells maintain homeostasis

% change in mass vs sugar solution concentration