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Sand can't dissolve in water because the 'spaces' in between the water particles are too small and the sand particles are to big to 'hide' in them, which is what would happen, for example, when you dissolve salt in water.

If you heat the water up enough the solubility increases, so the 'spaces' get larger, because particles gain more kinetic energy and get further apart when they heat up (i.e. gain kinetic energy), they may start to dissolve, but this is unlikely. Sand has quite large particles, so the temperature of the water would have to be pretty high, which may cause the water to evaporate.

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13y ago

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