Dialysis Experiment
kit #23
Chemical and biological theories come to life in this natural continuation to the study of osmosis and diffusion (LAB-AIDS® Kit No. 22). In this activity, students use a colloidal solution of starch and sodium chloride to vividly observe dialysis. They also observe diffusion of a solute through a semi-permeable membrane. Students then remove an inorganic salt from a colloid and test for the presence of chloride ions and starch with simple color tests. Individualized worksheets guide students through the step-by-step procedure in this self-directed lab activity.
- Observe diffusion of a solute through a semi-permeable membrane
- Remove an inorganic salt from a colloid
- Test for presence of chloride ions and starch with simple color tests
Content List in Dialysis Experiment is as follows:
| Quantity | Description |
|---|---|
| 30 | Dialysis membranes |
| 30 | Plastic containers |
| 12 | Chemplates® |
| 3 | Bottles of Iodine Solution |
| 3 | Droppers |
| 2 | Bottles of Starch Suspension |
| 2 | Bottles of Sodium Chloride solution |
| 1 | Bottle of Silver Nitrate solution |
| 1 | Bottle of Deionized Water |
| 30 | Student Worksheets and Guides |
| 1 | Teacher’s Guide with MSDS |
- Number of Students
- 30
- Number of Groups
- Maximum 12 groups per period
To complete this kit requires 1 ~50-minute class period.
