The boiling point of ethanolCH3CH2OH is78.50°C at 1 atmosphere. A nonvolatile,nonelectrolyte that dissolves in ethanol isestrogen (estradiol). Â
How many grams of estrogen,C18H24O2(272.4 g/mol), must be dissolved in265.0 grams of ethanol to raisethe boiling point by 0.500 °C ? Refer to the tablefor the necessary boiling or freezing point constant.
| Solvent | Formula | Kb (°C/m) | Kf (°C/m) |
|---|
| Water | H2O | 0.512 | 1.86 |
| Ethanol | CH3CH2OH | 1.22 | 1.99 |
| Chloroform | CHCl3 | 3.67 | |
| Benzene | C6H6 | 2.53 | 5.12 |
| Diethylether | CH3CH2OCH2CH3 | 2.02 | |
g estrogen.
