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Chemistry 2

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An aqueous solution has a vapor pressure of 81.1 at 50 . The vapor pressure of pure water at this temperature is 92.6. What is the concentration of in mass percent?

  • Chemistry 2 -

    What is the concn of WHAT? in mass percent?
    Psoln = Xsolvent*Psolvent
    81.1 = Xsolvent*(92.6)
    Solve for X which is the mole fraction of the solvent,
    1-mole fraction solvent = mole fraction solute.
    Convert mole fraction solute to mass percent.

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