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Q.

Why do we add salt to ice?

Tags: food, money, science
Asked by MOHAN, 30 Jun '12 09:02 pm
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Answers (7)

 
1.

If you live in a place that has lots of snow and ice in the winter, then you have probably seen the highway department spreading salt on the road to melt the ice. You may have also used salt on ice when making home-made ice cream. 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 Fahrenheit (0 degrees Celsius). When you add salt, that temperature drops: A 10-percent salt solution freezes at 20 F (-6 C), and a 20-percent solution freezes at 2 F (-16 C). On a roadway, this means that if you sprinkle salt on the ice, you can melt it. The salt dissolves into the liquid water in the ice and lowers its freezing point.
Answered by jameel ahmed, 30 Jun '12 09:05 pm

 
  
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2.

Otherwise it wil melt in water
Answered by vedprakash sharma, 30 Jun '12 11:13 pm

 
  
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3.

To form a freezing mixture
Answered by PRANIL MUNGEKAR, 30 Jun '12 09:07 pm

 
  
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4.

To stop the ice from getting melted.
Answered by Damodar Biswal, 30 Jun '12 09:05 pm

 
  
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5.

To reduce its melting point ....down to -4 deg C.
Answered by Mrinalendra Banerjee, 30 Jun '12 09:04 pm

 
  
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6.

I dont do that , if i want will use sea's water
Answered by nahu khan, 30 Jun '12 09:03 pm

 
  
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