The freezing point of pure chloroform is -63.5°C, and its freezing point depression constant is 4.07°C•kg/mol. If the freezing point of a solution of benzoic acid in chloroform is -70.55°C, what is the molality of this solution? 0.58 m 1.7 m 16 m 17 m

The molality of this solution is 1.7 m

Explanation:

Depression in freezing point:

where,

= freezing point of solution =

= freezing point of pure chloroform =

= freezing point constant of benzene =

m = molality

i = Van't Hoff factor = 1 (for non-electrolyte)

Thus the molality of this solution is 1.7 m

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