Explore osmosis and diffusion!
In this practical, dialysis tubing is used as a surrogate cell membrane for a visual demonstration of osmosis and diffusion. This inexpensive and simple experiment provides students with a clear visual result that effectively demonstrates how the size of a molecule can affect its ability to be transported into or out of a cell. It also illustrates the mechanics of diffusion and osmosis by which a cell will attempt to create homeostasis, or equilibrium between its inner and outer environments.
- 1 x Dialysis Tubing (3m)
- 1 x Starch Solution (2%) (100mL)
- 1 x Glucose Solution (30%) (100mL)
- 1 x Potassium Iodine Solution (15mL)
- 20 x Transfer pipettes
- 50 x Glucose Test Strips