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Menthol is a crystalline substance with a peppermint taste and odor. When 1.19 g of menthol...

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Chemistry

Menthol is a crystalline substance with a peppermint taste andodor. When 1.19 g of menthol is dissolved in 25.0 g of cyclohexane,the freezing point of the solution is lowered by 6.34 ∘ C. Look upthe freezing point and K f constant for cyclohexane in theColligative Constants table. Calculate the molar mass ofmenthol.

SolventFormulaKf value*

(°C/m)

Normal freezing

point (°C)

Kb value

(°C/m)

Normal boiling

point(°C)

waterH2O1.860.000.512100.00
benzeneC6H65.125.492.5380.1
cyclohexaneC6H1220.86.592.9280.7
ethanolC2H6O1.99–117.31.2278.4
carbon
tetrachloride		CCl429.8–22.95.0376.8
camphorC10H16O37.8176

Answer & Explanation Solved by verified expert
3.8 Ratings (392 Votes)
Mass of menthol is 119 gMenthol is a nonelectrolyte and hence has vant Hoff factor i1Now the depression in freezing point for the solution is givenasNow the    See Answer
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