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 melts ice faster because it lowers the freezing point of water. This is known as freezing point depression. The salt used on sidewalks and roadways will melt ice down to -9 degrees
http://www.ask.com/web-answers/Food_and_Drinks/Foo...
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...
Salt makes ice melt faster because it makes the water's melting point become lower. For example pure water normally freezes (and melts) at 0°C (or 32°F), where as water with
http://wiki.answers.com/Q/Why_and_how_does_salt_ma...
The freezing point of water, the temperature just cold enough to make it freeze into ice, is 0 degrees Celsius. Dissolving salt in water makes the water harder to freeze. To get salt
http://answers.yahoo.com/question/index?qid=201012...
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