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They're both sort of white. Other than that, not much.

Putting flour on ice is not going to help much. Salt "melts" ice by lowering the freezing point of the water. In order to do this it has to be able to dissolve in the water, and flour doesn't dissolve well. Also, the amount the freezing point is lowered depends on the number of species the substance dissociates into, which means it depends on the type of substance (ionic works better) and the molecular weight (lower works better). Salt is an ionic substance with a molecular weight of about 58 (and dissociates into two species, giving it an "effective molecular weight" of 29), while flour is a mixture of several covalent substances with molecular weights in the tens of thousands or higher. Any improvement in driving conditions you generate by dumping flour on the highways is going to be largely from converting it into (sticky) "dough" rather than melting the ice.

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10y ago

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