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An aqueous CaCl_2 solution has a vapor pressure of 82.1mmHg at 50C. The vapor pressure of pure water at this temperature is 92.6mmHg.

What is the concentration of CaCl_2 in mass percent?

  • Chemistry -

    I would approach the problem this way.
    You know Psolvent = Xsolvent</sub*Posolvent. This allows you to determine Xsolvent. Now you have X for solvent and X for CaCl2. Convert those to grams and to mass percent.
    Can you take it from here?

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