SAT Subject Test Chemistry,10 edition

9 . What    is  the freezing    point   of  a   solution    containing  0.5 mol of  glucose dissolved   in  200 g   of

H 2 O?  (The    Kf  for water   is  1.86°Cm–1.)

    °C

10 . The osmotic pressure at STP of a solution made from 1 L of NaCl (aq) containing 117 g of
NaCl is

(A) 44.77   atm

(B) 48.87   atm

(C) 89.54   atm

(D) 117 atm

11 . At 18°C, the vapor pressure of pure water is 0.02 atm, and the vapor pressure of pure ethyl
alcohol (MW = 46) is 0.50 atm. For a water-alcohol mixture with the alcohol present in a
mole fraction of 0.2, find the vapor pressure due to the alcohol and the vapor pressure
due to water. (Assume solution to be ideal.)

    atm