Question

List the following aqueous solutions in order of decreasing freezing point: a. 0.040 m glycerin (C3H8O3) b. 0.020 m potassium bromide (KBr)c. 0.030 m phenol (C6H5OH).

Answer 1

Answer:c>b>a

Explanation:

Freezing point depends on relative molecular mass and nature of intermolecular forces. In glycerin, the relative molecular is the least of the the molecules are held together only by weak Vanderwaals forces. Phenol has stronger dipole interactions and higher relative molecular mass. Potassium bromide is ionic and posses very strong bonds hence it has the highest freezing point.