BI-1690
Osmosis
Biology · Secondary 4 · Hard · Osmosis
In an experiment, a student places identical potato strips into three sucrose solutions of concentrations 0.1 mol/dm³, 0.3 mol/dm³ and 0.5 mol/dm³. After 30 minutes, the percentage change in mass is recorded as:
0.1 mol/dm³: +8%
0.3 mol/dm³: 0%
0.5 mol/dm³: −6%
Which statement explains the result in 0.5 mol/dm³ sucrose solution?
0.1 mol/dm³: +8%
0.3 mol/dm³: 0%
0.5 mol/dm³: −6%
Which statement explains the result in 0.5 mol/dm³ sucrose solution?
- Water enters the potato cells by osmosis, causing them to gain mass.
- Water leaves the potato cells by osmosis into the more concentrated solution, so mass decreases.
- Sucrose diffuses into the potato cells, increasing their water potential.
- Sucrose leaves the potato cells by diffusion, so their volume shrinks.
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