how come if you put salt in water it boils at a lower temperature?

Answer 1

Do not put salt befor the water boils it will make it boil longer

Answer 2

Salt is slightly unusual, if by salt you mean Sodium Chloride. In common with most dissolved substances it RAISES the boiling point of the water. Its unusual nature is in the fact that the effect is relatively small.
You can tell that it raises the boiling temperature with a simple experiment. Cut up a potato int 1cm cubes. Place an equal number of cubes into two pans of boiling water - one with salt in the other without. The potato in the salted water cooks quicker because of the higher boiling temperature.

Answer 3

I think they're right - it *raises* the boiling point.

Point is: dissolving *anything* in the water does this. So it can't be because the dissolved particles are attracting the water molecules or something like that - because there are bound to exist some substances which do the opposite.

Could it be this?: The dissolved particles act like a gas. Imagine the water like a gas cylinder: the pressure of the gas causes it to expand; the water stretches slightly and *its* pressure drops (the pressure of the water + the salt gas still equals atmospheric).

But pressure is simply thought of as the number of bangs/second by the water particles. So the water particles must hit the surface fewer times/second - since the pressure has dropped. So the rate of evaporation will slow.

Is this saying the same thing?: Exaggerating to make it clearer: let the water double its volume. There are consequently only half the number of visits/unit time to the surface (where evaporation occurs) by water molecules. So the rate of evaporation is halved

Answer 4

At higher you mean. Salt molecules exert extra attractive force on the H2O molecules, so it becomes harder for them to escape from the container. In other words, the water molecules would require a greater kinetic energy to overcome the forces of attraction exerted by the mineral ions. Did you know that boiling point does not only depend on the amount of impurity(salt in this case) present in the water. Altitude, or rather, the atmospheric pressure acting on the medium, can also affect the bp, not only of water but also of any other liquid.(Imagine water being boiled at 40 degrees centigrade)

Answer 5

It causes water to boil at a higher temperature and can lower the freezing temperature

Answer 6

Actually, I believe it boils at a slightly higher temperature.

Either way, instead of being just plain water, adding the salt makes it a different chemical. Just like adding ethylene glycol (antifreeze) raised the boiling temp up to about 225 degrees or so. Then, put it into a pressurized system (radiator), the boiling point then goes up to about 275 or so.

Any other homework you need help with? lol

Answer 7

salt impacts the boiling and freezing component of water. It lowers the boiling component (making it extra straightforward to boil the water with much less warmth) and it lowers the freezing component so as that the ice that incorporates the salt moreso is in all likelihood to soften. Grandma is a clever woman! You word the salt to water interior the bucket you're using to make the ice cream so as that the water gets chillier than 32 tiers!

Answer 8

salt in water is called a colligative solution. the salt ionises and elevates the boiling point of the solution so it actually boils at a higher temperature.

Answer 9

Actually, it raises the boiling temperature.

The salt molecules weigh down the water molecules and restrict their movement so it takes more energy for the water to boil.

Answer 10

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it boils at a higher tempurature
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Simply: The salt acts like a kind of glue to keep the water in one piece. So the water needs more heat and a higher temp to boil and release water vapor, the salt stays in the pot