Gelli baff

Gelli Baff, a crystalline powder, has been dumped into a bathtub filled with water. How can you force the hydrogel to go down the plughole in order to drain the bathtub? 

In this investigation, students learn about swelling reactions, balanced reactions, and polymerisation. Students should be able to describe how a superabsorbent works and establish a relationship between superabsorbents and polymers. Students should be able to describe how the gel becomes liquid again and should realise the relationship between the absorption ability of the gel and salt

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This resource is part of Teaching enquiry with mysteries incorporated

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