Using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. i already know that it is calcium chloride but i don't have the answer completely worked out. can someone explain it ? you

Calcium chloride

Explanation:

Colligative  property depends upon number of particles. The colligative property is independent of the nature of solute present in a solution.

More the number of particles larger the colligative property.

The following are colligative property

a) depression in freezing point

b) elevation in boiling point

c) relative lowering of vapor pressure

d) osmotic pressure

Thus if we wish to melt the we will take calcium chloride as it will give more number of ions per molecules as compared to sodium chloride.

the answer is symmetrical : )