Here's A Science-Backed Guide To De-Icing Your Driveway

January 26, 2015 6:52 PM

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You already know salt is a good tool for melting ice on snowy roads, driveways, and sidewalks. But have you ever wondered how something that's not hot can cause ice to melt?

Actually, salt isn't about melting. As explained in a new video from the American Chemical Society (above), it's about lowering water's freezing point below the usual 32 degrees Fahrenheit (0 Celsius)--a phenomenon chemists call freezing point depression.

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