Question

Why cacl2 is preferred over nacl to clear snow in cold countries?

Answer 1

CaCl2 and NaCl, when added to snow, decrease the freezing point of water, so that at it can freeze at a temperature lower than surrounding temperature. Moreover, the above salts are highly preferred for this purpose as they undergo dissociation, thus have higher Van't Hoff's factor so depression in freezing point is higher.

Answer 2

Answer:

CaCl2 is preferred over NaCl for clearing ice on roads on particularly in very cold countries due to much lower freezing point of eutectic mixture of CaCl2/H2O.

Explanation:

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