Does salt melt ice faster?

Answer

Adding salt to ice does make the ice melt much faster. The formation of ice occurs when the temperature of water reaches 0 degrees Celsius.

The reason salt causes ice to melt is that a water solution, and the dissolved salt has a lower freezing point than a pure substance like plain water.

The addition of salt to ice dissolves the film of liquid water on the surface of the ice. This lowers the film’s freezing point below the ice’s temperature. The salty water solution begins to melt the ice and then creates more liquid water.

However, using salt to de-ice a sidewalk when the temperature is below 0 degrees Fahrenheit or -17.77 degrees Celsius does not melt the ice.

Q&A Related to "Does salt melt ice faster?"
Salt lowers the freezing/melting point of water, so in both cases the idea is to take advantage of the. lower melting point. Ice forms when the. temperature of water reaches 32 degrees
http://wiki.answers.com/Q/Why_does_salt_make_the_i...
Ice is formed when the temperature of water is only 32 degrees Fahrenheit, or zero degrees Celsius. According to General Chemistry Online, if water and ice are placed near each other
http://www.ehow.com/about_6384476_salt-melt-ice-fa...
When salt is added to ice, there is a change in the balance of the movement of molecules of water on the surface of the ice. The movement of the molecules of water is increased, causing
http://www.ask.com/web-answers/Food_and_Drinks/Foo...
Pure water freezes at 0 degrees Celsius or -32 Farenheit. When things freeze, or become solid from a liquid state, the usually form a crystal structure at the atomic level. In other
http://answers.yahoo.com/question/index?qid=200811...
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