Question

Why does NaCl solution freeze at a lower temperature than water?

Answer 1

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Answer 2

Answer:

Explanation:

Freezing point of a liquid depends upon the inter-molecular force between the molecules of the liquid. When the the inter-molecular force deceased the Freezing point of a liquid is also decrease. When salt $(NaCl)$ is added with water it forms $Na^+$ and $Cl^-$ ion. This ions attract the water molecules and thus decrease the inter-molecular force between water particles. As the the inter-molecular force deceased the freezing point of NaCl solution is also decrease.