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Chemistry

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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 -

    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 -

    why do the water vapor change back to a liuid

  • Chemistry -

    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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