I'm not a chemist, but there should be a table that gives Freezing Point of water for various percentages of salt. My point is that EVERYTHING can be made to Freeze if you drop the Temperature to Absolute Zero. You need to be more specific to what Temp level you want to keep your water mixture.
SALT
salt
7 table spoons of salt stops 500ml of water from freezing
The freezing cannot be stopped; only the freezing temperature is lowered adding salts.
b
if your talking about salt, it only adds friction and therefore grip for vehicles, it doesnt stop them freezing
No, when salt is added to water it both raises the boiling point and lowers the freezing point. Because salts break up in water, the pieces will stop water from freezing. In order to freeze, a water molecule must form more attractive forces with the molecules around it than it forms in the liquid state. The ions of a salt will get between the water molecules stop them from forming attractive forces, raising the freezing point. Salt will lower the boiling point because the ions on the surface of the water will take the place of water molecules on the surface. Since boiling happens on the surface, the fewer water molecules on the surface the higher the boiling point. The more ions the salt breaks into, the more effective this is. For example, table salt is NaCl and becomes Na+ and Cl- while road salt is CaCl2 and will break up into three ions, Ca+ and 2Cl-.
When you add the salt it increases the boiling point of the water, so bubbling stops until this new solution reaches its boiling point. Adding salt, sugar, or any solute to water raises the boiling point and lowers the freezing point of water.
Ice has a freezing point which is generally 32 degrees and when salt is put onto frozen water it turns it into liquid. When it turns into liquid it's no longer frozen as long as the salt remains present.
heat it up, add energy to it
Water freezes at a temperature of 32F (0C).Salt molecules are connecting with water molecules, making it more difficult for ice to form. The result is a solution with a lower freezing point. For example, a 10% salt solution freezes at 20F (-6C), while a 20% salt solution freezes at 2F (-16C). Since salt has a lower freezing point, it'll be hard for ice to form. When you add salt to the ice water, you lower the melting temperature of the ice down to 0F (-17) or so.
In the winter, when the temps go below freezing, there should not be any water in a car. It should be antifreeze, actual windshield wiper fluid, etc.... This will prevent any freezing.