1. A solution is prepared from 4.5723 g of magnesium chloride
and 43.240 g of water. The vapor pressure of water above this
solution is found to be 0.3622 atm at 348.0 K. The vapor pressure
of pure water at this temperature is 0.3804 atm. Part A Find the
value of the van't Hoff factor i for magnesium chloride in this
solution. Express your answer using four significant figures.
2. A solution of a nonvolatile solute in water has a boiling
point of 381.3 K . Part A Calculate the vapor pressure of water
above this solution at 338 K. The vapor pressure of pure
water at this temperature is 0.2467 atm.
3. The vapor pressure of carbon tetrachloride, CCl4, is 0.354
atm and the vapor pressure of chloroform, CHCl3, is 0.526 atm at
316 K. A solution is prepared from equal masses of these two
compounds at this temperature.
Part A Calculate the mole fraction of the chloroform in the
vapor above the solution. Express your answer to three significant
figures.
Part B If the vapor above the original solution is condensed and
isolated into a separate flask, what would the vapor pressure of
chloroform be above this new solution? Express your answer to three
significant figures.