Homework Help: Chemistry

Posted by kendra on Monday, August 30, 2010 at 8:07pm.

Which of the following statements is (are) true?
A. The vapor pressure of CO2 is lower than the vapor pressure of water.
B. Sea water has a lower vapor pressure than distilled water.
C. The vapor pressure of 1 m NaCl is higher than the vapor pressure of 0.5 m KNO3, assuming that the solvent in each case is water.
D. The vapor pressure of 1 m sucrose (C12H22O11) is higher than the vapor pressure of 1 m NaCl where the solvent is water.
E. The vapor pressure of 0.10 m NaCl is higher than the vapor pressure of 0.05 m MgCl2, assuming the solvent in each case is water.

Chemistry - DrBob222, Tuesday, August 31, 2010 at 12:16am
What do you think about these. You know A can't be right because CO2 is a gas at room temperature and H2O is a liquid. B certainly is true since
P(soln) = X(solvent)*P(solvent) and sincd X(solvent) is lower for solutions than it is for pure liquid, the vapor pressure of the solution must be less.
tucker tigers - michael, Wednesday, September 14, 2011 at 4:44pm
why do the water vapor change back to a liuid
Chemistry - Anonymous, Tuesday, April 17, 2012 at 12:06am
Rank these aqueous solutions in order of decreasing freezing point:

1 m Na2SO4

1 m LiF

1.5 m CaCl2

1.5 m glycerol

2 m NH4Cl

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