Tuesday
July 22, 2014

Homework Help: Physical chemistry

Posted by Melissa on Thursday, September 30, 2010 at 8:27pm.

Estimate the vapor pressure of sea water at 20C given that the vapor pressure of pure water is 2.338 kPa at that temperature and the solute is largely Na+ and Cl- ions, each present in about .50 mol/dm^3.
I'm pretty sure the formula to use is pj=xjpj'. Where pj' is the vapor pressure of a pure substance, but I can't figure out how to solve for the mole fractions on the sodium and chlorine. Thanks

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