Asked by Dina

A solution of sodium chloride in water has a vapor pressure of 18.3 torr at 25°C. What is the mole fraction of NaCl in this solution?
__________

What would be the vapor pressure of this solution at 45°C? The vapor pressure of pure water is 23.8 torr at 25°C and 71.9 torr at 45°C.


________torr

Answers

Answered by DrBob222
For 1,
delta Psolution = Xsolute*P<sup>o</sup><sub>solvent</sub>

Look up vp H2O at 25 C, that is Po.
Take the difference between that and 18.3 to obtain delta P.
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