Title: Conduct any activity to demonstrate osmosis
Materials/Equipment/Apparatus
- Water
- Visking Tubing
- Beakers
- Sucrose Solution
- Funnel
- Weighing Scales
Procedure/Method
- Soak the visking tubing in water to soften it
- Make a knot on both visking tubings
- Fill one half of visking tubing with sucrose using funnel and another half of different visking tubing with water using a funnel
- Get rid of as much air as possible and then knot the open end of the visking tubings
- Tie the two ends of the visking tubings together
- Record the turgidity and weight of the visking tubings
- Put each of the visking tubings in a beaker filled with water for 15 minutes
- Take about the visking tubings, dry them and then record the turgidity and weight of the visking tubings
Safety/Risks
- Tie back hair
Labelled Diagram
(Insert Diagram Here)
Results
| Tube Contents | Turgidity at Start | Turgidity after test period | Mass at start (g) | Mass after test period (g) |
|---|---|---|---|---|
| Sucrose Solution | floppy | hard | 41.7g | 45.5g |
| Distilled Water | floppy | floppy | 29.9g | 30.2g |
Conclusion
Water travels from an area of high concentrations to an area of low concentrations across a semi-permeable barrier. This process is called Osmosis.