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Innovating Science™ AP Biology Investigation Kit No. 4: Diffusion and Osmosis

To observe osmosis and diffusion in living tissue.

Supplier:  Innovating Science™ IS3704

Catalog No. S07056

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WARNING: This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer and reproductive harm.

Requires :
  • Paper towels
  • Distilled or deionized water
  • Electronic balance
  • Large onion
  • Fine-point forceps/tweezers
  • Microscopes
  • Potatoes, sweet potatoes, or yams



  • Students study concepts in osmosis and diffusion process
  • Movement of water and nutrients across cell membrane
  • Investigate relationship between surface area and volume as it relates to cells and diffusion
  • Examine the concept of molarity and its relation to osmotic potential and movement of water
  • Cell size, shape and water elimination affect the overall rate of nutrient intake
  • Students use plant tissue to determine molarities of unknown solutions based on direction and degree of water movement
  • Meets AP Science Practices 2, 4, and 5, and Big Idea 2
  • For 8 groups
  • Kit Includes:
    • Agar (45 g)
    • Bromothymol blue concentrate (15 mL)
    • 2M Hydrochloric Acid (2 x 25 mL)
    • Sucrose Quick Solution (Makes 0.2M, 0.4M, 0.6M, 0.8M, 1M)
    • Sodium Chloride Quick Solution
    • Ovalbumin Quick Solution
    • Glucose Quick Solution
    • Distilled Water Solution
    • Food coloring set
    • Plastic cups
    • 8 Agar block casting trays
    • 40 pieces dialysis tubing
    • 8 Plastic knives, stirrers
    • 8 metric rulers
    • Microscope slides, Coverslips
    • Teacher manual
    • Student study guide


49 CFR 173.4, meets AP Science Practices 2, 4, and 5 as well as Big Idea 2.
13 to 20
1 Kit
8 Lab Groups
AP Biology Investigation Kit #4: Diffusion and Osmosis
7 to 14
Studying the movement of water and nutrients across a cell membrane. Observe osmosis in living tissue, investigate the relationship between surface area and volume as it relates to cells and diffusion
12 x 12 x 12 in.


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