Compare5 marksStandard
A student investigated osmosis using Visking tubing, which is a partially permeable membrane. Three lengths of Visking tubing were each filled with 10 cm³ of sucrose solution of different concentrations and tied at both ends. Each tube was weighed and then placed into a beaker of distilled water at 20°C. After 30 minutes, the tubes were removed, dried carefully, and weighed again. The results are shown in the table.
| Sucrose concentration / % | Initial mass / g | Final mass / g | Change in mass / g | Percentage change in mass / % |
|---|---|---|---|---|
| 0 (distilled water) | 10.0 | 10.0 | 0.0 | 0 |
| 5 | 10.0 | 11.2 | 1.2 | 12 |
| 10 | 10.0 | 12.5 | 2.5 | 25 |
Compare the direction and amount of water movement for the 5% and 10% sucrose solutions, and explain your observations in terms of water potential.