Lab-Aids: Dialysis Experiment Kit
Chemical and biological theories come to life in this natural continuation to the study of Osmosis and Diffusion (LAB-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.
Scientific Concepts:
- 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:
- 1 Teacher's Guide with MSDS
- 30 Student Worksheets and Guides
- 12 Chemplates‚®
- 30 Containers, plastic
- 3 Droppers
- 30 Dialysis membranes
- 3 Iodine Solution, bottle
- 2 Sodium Chloride, bottle
- 2 Starch Suspension, bottle
- 1 Deionized Water, bottle
- 1 Silver Nitrate, bottle
Classroom Planning:
- To complete this kit requires 1 ~50-minute class period
- Number of Students 30
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