Answer Happy

1. The nonvolatile, nonelectrolyte chlorophyll, C55H72MgN4O5
(893.5 g/mol), is soluble in ethanol CH3CH2OH. Calculate the
osmotic pressure (in atm) generated when 14.7 grams of chlorophyll
are dissolved in 178 mL of a ethanol solution at 298 K.
__atm
2. The ionic
compound BaCl2 is soluble in
water. Calculate the osmotic pressure (in atm) generated
when 10.6 grams of barium
chloride are dissolved
in 91.6 mL of an aqueous solution at 298
K. The van’t Hoff factor
for BaCl2 in this solution
is 2.43.
__atm
3. In a laboratory experiment, a student found that
a 159-mL aqueous solution
containing 2.412 g of a compound had an
osmotic pressure of 12.3 mm Hg
at 298 K. The compound was also found to
be nonvolatile and a nonelectrolyte. What is the molar mass of this
compound?
__g/mol
4.The vapor pressure
of ethanol (CH3CH2OH)
is 54.7 mm Hg at 25 °C. What is the
vapor pressure of a solution consisting
of 178 g
of ethanol and 0.188 mol
of a nonvolatile nonelectrolyte?

VP(solution) = mm Hg
5.The vapor pressure of diethyl ether
(ether) is 463.6 mm Hg at
25 °C.

How many grams
of testosterone , C19H28O2,
a nonvolatile, nonelectrolyte (MW
= 288.4 g/mol), must be added
to 211.0 grams of diethyl
ether to reduce the vapor pressure
to 452.9 mm Hg ?

diethyl
ether = CH3CH2OCH2CH3 = 74.12 g/mol.


g testosterone