Required Practical: Osmosis (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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Practise the cards
14 cards from this deck
What is the aim of the potato-sugar solution practical?
What is the aim of the potato-sugar solution practical?
Investigate effect of sugar conc. on potato mass via osmosis
Process demonstrated in potato practical
Process demonstrated in potato practical
Osmosis
Tool used to cut uniform potato cylinders
Tool used to cut uniform potato cylinders
Cork borer
Sugar solution concentration range used
Sugar solution concentration range used
0.0 M to 1.0 M
Incubation time for potato cylinders
Incubation time for potato cylinders
24 hours
Formula: percentage change in mass
Formula: percentage change in mass
What to plot against sugar concentration
What to plot against sugar concentration
Percentage change in mass
X-axis crossing point indicates
X-axis crossing point indicates
Equal water potential inside and outside potato
Solution type if potato gains mass
Solution type if potato gains mass
Hypotonic (lower conc. than cell sap)
Solution type if potato loses mass
Solution type if potato loses mass
Hypertonic (higher conc. than cell sap)
Solution type if no mass change
Solution type if no mass change
Isotonic (equal conc. to cell sap)
Type of membrane in osmosis
Type of membrane in osmosis
Selectively permeable membrane
Direction of water movement in osmosis
Direction of water movement in osmosis
Higher to lower water potential
What cells maintain via osmosis
What cells maintain via osmosis
Homeostasis