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wolverine [178]
3 years ago
14

what is the mole fraction of a nonelectrolyte in a aqueous above which the vapor pressure of water is 745 mm hg at 100C

Chemistry
1 answer:
4vir4ik [10]3 years ago
3 0
Rault's law: the vapor pressure of a non-volatile solution is equal to the vapor pressure of the solvent times the molar fraction of the solvent (at the same temperature).

Pv water in the solution = X water * Pv of pure water

745 mmHg = Xw * 760 mmHg

Xw = 745/760 = 0.98

Molar fraction of the solute = 1 - 0.98 = 0.02

Answer: 0.02
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