What temperature does salty water freeze at?

Answer 1

When you add salt to water, you introduce dissolved foreign particles into the water. The freezing point of water becomes lower as more particles are added until the point where the salt stops dissolving. For a solution of table salt (sodium chloride, NaCl) in water, this temperature is -21°C (-6°F) under controlled lab conditions. In the real world, on a real sidewalk, sodium chloride can melt ice only down to about -9°C (15°F).

Answer 2

Technically, salt water does not freeze. The icebergs in the oceans have been tested extensively and they are only chemically composed of water and air pockets. The salt tends to shift to the outside edge of the berg. The salt can actually be scraped off the edges of the giant ice block. So for all technical purposes the frozen substance is actually just water and nothing more. The freezing point of the ocean water is considerably higher then that of plain H2O. Remember that dissolving any substance in water raises or lowers the freezing and boiling point.

Answer 3

0 degree water freezes
it id the same as 32 f
if water is salty it freezes on lowerr degrees
but what is a lowe degree
it depends on the amount of salt
now do some experiment
get a bowel
put ice in it and a thermometer
you will notice that you read 0 degree
now start to add some salt(regular food salt) st ire ice with thermometer
notice the temperature
once i did it i got ice salty changed into liquid and temperature was -20 degrees

Answer 4

That depends on the concentration of the salt, and what kind of salt you use. When you dissolve a salt in water, the freezing point of water goes down. The difference between the temperature of pure water and the salt water is known as the freezing-point depression.

You can calculate the freezing-point depression using the following formula: (delta)T = i(-Kf)m, where,

(delta)T = The Freezing-Point Depression
i = the van't Hoff factor (for NaCl, this is 2)
Kf = the cyroscopic constant (for water, this is 1.858 K·kg/mol)
m = the molality of the solution

If that is over your head, I am willing to do the calculation for you if you tell me how much water you have and how much salt you have, assuming it's not so you can cheat on your homework.

Answer 5

Look at it from the other direction - making ice cream using rock salt and ice. The salt increases the cooling effect of the ice on the ice cream mixture since it causes it to melt faster, pulling the heat out of the mix and thus freezing it.

Answer 6

salt and water form an eutectic mixture that has about a 10°C lower freezing point than pure water: the ions prevent regular ice crystals from forming (below −10°C salt will not prevent water from freezing).

Answer 7

Salt water doesn't freeze.
The water freezes into crystals
and then the salt crystals freeze.
It's really a mixture of separate salt
and ice crystals. This happens at
about 21.1 C That's about as cold
as a salt water solution can get.

Answer 8

depends how much salt you add, but normally it's about -9ºC, but as the water freezes it tends to drive out impurites.

Answer 9

- 2

Answer 10

depends how much salt is in it. the more salt, the lower the temperature has to be to freeze it.