Menthol is a crystalline substance with a peppermint taste and odor. When 0.533 g of menthol is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 2.84 ∘C. Look up the freezing point and f constant for cyclohexane in the Colligative Constants table. Calculate the molar mass of menthol.

The molar mass of menthol is 156.15 g/mol

Explanation:

Depression in freezing point is given by:

= Depression in freezing point

= freezing point constant =

m= molality

Weight of solvent (cyclohexane)= 25.0 g = 0.025 kg  

Molar mass of solute (menthol) = ?

Mass of solute (menthol) = 0.533 g

The molar mass of menthol is 156.15 g/mol

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