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19 Nov 2019
Menthol is a crystalline substance with a peppermint taste and odor. When 0.504 g of menthol is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 2.69 °C. The freezing point and Kf constant for cyclohexane can be found below. Calculate the molar mass of menthol.
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 â117.3 1.22 78.4 carbon
tetrachloride CCl4 29.8 â22.9 5.03 76.8 camphor C10H16O 37.8 176
Menthol is a crystalline substance with a peppermint taste and odor. When 0.504 g of menthol is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 2.69 °C. The freezing point and Kf constant for cyclohexane can be found below. Calculate the molar mass of menthol.
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 | â117.3 | 1.22 | 78.4 |
carbon tetrachloride | CCl4 | 29.8 | â22.9 | 5.03 | 76.8 |
camphor | C10H16O | 37.8 | 176 |
Bunny GreenfelderLv2
23 May 2019