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Water with salt evaporates slower than water without salt science project?
Wiki User
∙ 14y ago
Evaporation is a surface phenomenon. In case of pure water any of the molecules of water at surface have the chance of escaping into the air but when salt is added into water some of the ions of salt will come on the surface and thus block some of the surface area which was earlier available for water molecules to escape. Hence chance of water molecules escaping into air becomes less so water with salt evaporates slower than water without salt. This effect is known as elevation in boiling point.
Wiki User
∙ 14y ago
Adding salt to water raises its boiling point and reduces the rate of evaporation. This is due to the decreased vapor pressure of the saltwater compared to freshwater. The presence of salt particles in the water slows down the movement of water molecules at the surface, leading to a slower evaporation rate.
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