It doesn't. The presence of dissolved salt raises the boiling point of water resulting in it taking slightly longer to boil, all else being equal.
== Fresh water boils faster than salt water. Salt water will cook food a little quicker as it has a slightly higher boiling point than fresh water. Answer They both boil and cook at the same speed. It has been thought for many many decades that salted water increases the point at what water boils at (212 F). While technically true, a tablespoon of salt added to five quarts of water will bring up the temperature of the water at boil, but the degree hike is negligible. (One 7th of a degree. You would need a pound of salt in five quarts to make the theory work!) It has also been argued that the sodium chloride is electrically excited by heat and causes the water to boil faster. This is so far from the truth! Salt doesn't speed up the cooking process any faster than fresh water. You want the real truth? Salting the water was for nothing more than to flavor the product being boiled! That's it! Boiling/cooking speed is solely dependant on the product's density. Some pastas and potatoes are thicker and denser than others. This, and only this, is the variable between cooking times in boiling water. Want to cook potatoes fast? If they are large, fat or with skin on, cut them in quarters, halves or any size that will reduce their density. For pasta, remember to bring the water to a boil before putting the pasta in. When the water returns to a boil after adding the pasta, boil it for three minutes and reduce the temp and simmer it until the pasta sticks to stainless steel spoon or the side of your kitchen sink. Remember to remove it from the water immediately, (pasta continues to cook with its stored heat for a while after removing from the stove. You don't want to make it mushy!) and toss with your choice of oil to prevent sticking.
I believe that plain water will be boil the faster because the others have a higher boiling point when compared to plain water.
Salt water heats up faster and eventually gets to its boiling point first. This is because salt water is less pure than water and takes less energy to heat.
it has come to a deccicion that salt water boils slower then normal water
drinking water boils faster because the saltwater has to desolve first.
Salt water boils faster than fresh water because of its high salt content. This reduces its heat capacity and the overall amount of time required to bring it to the boiling point.
Prescence of impurities in salted water(salt)would raise its boiling point and it will boil after a long time(slower)than ordinary water
tap water boils faster than salt water
fresh water doesnt have salt so it doesnt take as long to have the salt evaporate
Salt water boils HOTTER, not necessarily faster.
Fresh water.
Fresh water.
salt water, as the salt water eats away at the coin faster.
saltwater boils the fastest
The water that boils fasteris fresh water because salthas an effect on water.
fresh water doesnt have salt so it doesnt take as long to have the salt evaporate
For salt water to boil faster than plain water, the salt concentration would have to be fairly high. In addition, the salt water would need to be a salt water solution before putting the pot on to heat because of the density of the water content itself.
Salt water boils HOTTER, not necessarily faster.
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plain not sure
Fresh water.
fresh water
Fresh water.
I think it is fresh water freezes faster because the salt melts ice.
it makes the water boil faster