BI-424
Osmosis
Biology · Secondary 3 · Hard · Osmosis
A student places a dialysis tubing bag filled with 20% sugar solution into a beaker of 5% sugar solution. The tubing is partially permeable to water but not to sugar. After 30 minutes, what happens to the bag and why?
- The bag gains water and swells because water enters by osmosis.
- The bag loses water and shrinks because sugar diffuses out.
- The bag stays the same size because concentrations are different.
- The bag bursts because sugar enters by diffusion.
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