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Substances in the gummy bear that give it solidity are: glucose, starch and

Gelatin. All of these substances can absorb (form some interaction with)

water. However, while water can be absorbed, the starch and gelatin are

prevented from dissolving in water. So the water swells the gummy bear rather

than dissolves it.

Think of a very dry sponge such as used for washing dishes. In this form

it is

a small, hard material. However, it is porous and water can go into those

pores. When water enters the pores, the sponge gets enlarged, and becomes

flexible.

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14y ago
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Q: Why does a gummy bear expand with a drop of tap water?
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