Question

The vapor pressure of diethyl ether (ether) is 463.57 mm Hg at 25°C. How many grams of DDT, C14H9Cl5, a nonvolatile, nonelectrolyte (MW = 354.5 g/mol), must be added to 223.2 grams of diethyl ether

to reduce the vapor pressure to 458.01 mm Hg ?

diethyl ether = CH3CH2OCH2CH3 = 74.12 g/mol.

g DDT