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How does salt stop ice on roads?

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Anonymous

14y ago
Updated: 8/17/2019

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.

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Wiki User

15y ago

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