Question

Why is salt (NaCl) put on icy roads and sidewalks in the winter?

Answer 1

Answer:  a) It is  ionic and lowers the freezing point of water.

Freezing point depression is the process of the decrease in the freezing point of a solvent by addition of a non-volatile solute such as salt. The salt is added to the icy roads so as to lower down the freezing point of water and preventing the formation of the ice on the road this phenomena is called as freezing point depression. The ionic components of the salt split apart like Na⁺ and Cl⁻ and interacts with the water molecules which combines to form the solid state ice. Thereby, ions of salt interrupting in the formation of the solid structure that is ice.

Answer 2

Why is sodium chloride (NaCl) put on icy roads and sidewalks in the winter?

          Your answer would be   

  a) It is ionic and lowers the freezing point of water.

Explanation:

to lower the freezing point so people don't slip

Hope this helps.