why does adding more salt to ice melt ice faster?

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help  please?

Posted Mon 11th March, 2013 @ 19:15 by Sandra

5 Answers

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Answered Mon 11th March, 2013 @ 20:43 by Sandra
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When you add salt to water it forms a solution, and since salt has a lower freezing point than water, the overall freezing point of the solution is lower, so the room temperature is even further above the freezing point, so the ice melts. Any help?

Answered Tue 12th March, 2013 @ 21:57 by Sarah Green
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I'm not sure, but I think it's either because the salt transfers heat energy to the ice making it melt faster or it may be something to do with osmosis

Answered Wed 13th March, 2013 @ 15:58 by Varshini
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I'm pretty sure it's osmosis, same theory as to why you put salt on slugs to kill them, and why your potato wedges are crispier when you put salt on them before you stick them in the oven :)

Answered Wed 3rd April, 2013 @ 17:42 by Kate Westall
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It's because adding salt changes the solution, and this solution has a lower freezing point than water. This means it'll need to be cooler for it to stay as ice, so it will melt faster at room temperature as there's a larger difference between the room temp and the freezing temp, methinks.

Answered Thu 4th April, 2013 @ 12:20 by Anneka