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.
| Solvent | Formula | Kf value* (°C/m) | Normal freezing point (°C) | Kb value (°C/m) | Normal boiling point(°C) |
| water | H2O | 1.86 | 0.00 | 0.512 | 100.00 |
| benzene | C6H6 | 5.12 | 5.49 | 2.53 | 80.1 |
| cyclohexane | C6H12 | 20.8 | 6.59 | 2.92 | 80.7 |
| ethanol | C2H6O | 1.99 | –117.3 | 1.22 | 78.4 |
carbon
tetrachloride | CCl4 | 29.8 | –22.9 | 5.03 | 76.8 |
| camphor | C10H16O | 37.8 | 176 | | |
