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Dissolving something in water which does not evaporate easily will make the mixed solution less likely to evaporate than pure water. The more stuff you add to it, the less likely it will evaporate. Adding salt to water makes ions in solution and these ions reduce the vapor pressure of the solution compared to pure water. The lower the vapor pressure of a liquid or solution, the slower it will evaporate. This effect is also related to boiling point elevation and freezing point depression. The following is taken from the site listed to the left of this answer, but that page has a lot of additional information, and this is the most important part. This is the real reason the vapor pressure of salt solutions are decreased: "The reason dissolved solutes (such as salt) increase boiling point is that the solute must come out of solution in order for the water to boil. This costs entropy (the entropy of solution). Boiling is entropically driven, hence the reduction in the net entropy gain of boiling results in a higher temperature needed for the reaction to go. To put it without jargon: for a little packet of water with dissolved salt to turn to steam the salt atoms must, in the course of their random zooming about, ALL simultaneously leave the packet. This is not a likely event. It becomes more likely as the temperature (i.e. the average speed of zooming about) becomes higher, though, and at a certain temperature above the ordinary boiling point it becomes sufficiently likely to allow boiling in spite of the handicap. You can also see that the effect will naturally increase with the concentration of dissolved solutes (i.e. the number of salt atoms per packet that must simultaneously leave)."

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18y ago

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Related Questions

Which evaporate faster sugar in water or salt in water?

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What evaporates faster sugar or salt?

Salt and sugar do not evaporate, but the water that they are dissolved in does.


Does salt water evaporate faster then sugar water?

yes


Why does salt water evaporate faster than tap or sugar water in the microwave?

because the salt sucks in the water faster. because the salt sucks in the water faster. because the salt sucks in the water faster.


Does water evaporate faster than water without salt?

Salt water will evaporate faster.


Does water salt water or sugar water evaporate faster?

They all evaporate at the same rate. The sugar and salt are in solution with the water. The sugar and salt will remain in the container after the water has evaporated. It will not affect the rate at which the water evaporates. I think you are wrong.Based on an experiment, sugar water evaporates the fastest followed by salt water as the more molecular weight the faster it evaporates.Sugar has more molecular weight than salt.


Does with salt and water with pepper sugar evaporate faster than water withth ater wi?

yes


Which evaporates faster water salt water sugar water?

Sugar water evaporates faster than salt water because sugar molecules are smaller and lighter than salt molecules, allowing them to escape into the air more easily. Additionally, sugar does not form strong bonds with water molecules, making it easier for the water to evaporate. Salt, on the other hand, forms strong ionic bonds with water, slowing down the evaporation process.


Will water with salt evaporate faster then water without salt?

no


What will evaporate faster salt sugar plain?

Well, if you have a bowl of water and get a salt shaker you can exame. So fill the bowl of water with the salt shaker and skake a little salt out, not to much or not to little. Then, the water soon will evaporate wich means that the salt will be left behind in the bowl and the water will be in the air. The salt is to heavy to go into the air so thats why it will be left behind in the bowl. So the its faster in a way. :D


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Will water with salt evaporate faster indoors or outdoors?

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