Question

1. A solution of sodium chloride in water has a vapor pressure of 19.6 torr at 25ºC. What is the mole fraction of solute particles in this solution? What would be the vapor pressure of this solution at 45ºC? The vapor pressure of pure water is 23.8 torr at 25ºC and 71.9 torr at 45ºC, and assume sodium chloride exists as Na+ and Cl- ions in solution.

Answer #1

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The vapor pressure of pure water at 25.0 oC is 23.8 torr. What
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A solution is made by dissolving 24.1 g urea (), a
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Calculate the vapor pressure of this solution at 25°C.
Vapor pressure = torr
Calculate the vapor pressure of this solution at 45°C.
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I know the answer is C, but why? (Show work and explain
please).

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