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Water Marbles—Chemical Demonstration Kit

By: The Flinn Staff

Item #: AP7429

Price: $20.40

The Water Marbles Polymer Chemistry Demonstration Kit is a fun discrepant event demonstration. Explore the properties of superabsorbent polymers using water marbles. Amaze your students by “floating” a steel sphere on “water.”

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Product Details

Explore the properties of superabsorbent polymers using water marbles. Amaze your students by “floating” a steel sphere on “water.” Since the water marbles have essentially the same refractive index as water, the steel sphere will appear to float on the surface of the water. Students will learn about the refractive index of water and the properties of polyacrylamide spheres. Students can also calculate how much the spheres have “grown” and how the different refractive indexes of air and water illuminate or conceal the presence of spheres. A fun discrepant event demonstration!

Concepts: Superabsorbent polymers, index of refraction, discrepant event.
Time Required: 15 minutes
Materials Provided: Water marbles, laser, steel sphere, and ruler.