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Edvotek™ What is Osmosis?
Introduction to the principles of osmosis.
Supplier: Edvotek™ S74
Includes: Complete instructions, background information and study questions; Low molecular weight dye (orange dye); High molecular weight dye (violet dye); Roll of dialysis tubing (7 ft.); Five transfer pipets
Requires : Table salt; Beakers or jars (600mL, approximately the size of the packaging tube); Distilled or deionized water; Spoon; Apple juice, beet juice or equivalent juices
Description
- Activities will be performed utilizing dialysis tubing and various concentrations of salt
- Dyes of different molecular weights will also be used to visually demonstrate the size selectivity of membranes
- For 5 lab groups
Students will learn the following concepts:
- Diffusion of small molecules across cell membranes is important for transferring nutrients to cells and removal of certain metabolic waste products
- Dialysis across a semi-permeable membrane can retain certain molecules and allow others to diffuse based on respective signs
- Water molecules move from low salt to high salt concentrations when separated by dialysis tubing
Order Info
Class size: five groups.
Specifications
What Is Osmosis Kit | |
Complete instructions, background information and study questions, high (violet dye) and low (orange dye) molecular weight dyes, dialysis tubing (7 ft.), five transfer pipets | |
45 min. | |
5 Lab Groups |
Students will be introduced to the principles of osmosis | |
300 to 400mL beakers, table salt, apple and beet juice, distilled water | |
Room temperature |
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