4. The vapor pressure of pure water and pure ethanol at 25 \deg C are 24 Torr and 44 Torr, respectively. Suppose you have a water - ethanol mixture and the total vapor pressure is 31.2 Torr. Sucrose, C12H22011, is a non-volatile solute that will not contribute to the total vapor pressure. When 0.03 moles of sucrose is added to the water - ethanol mixture, the vapor pressure drops to 29.8 Torr. How many moles of water are present in the solution?

4. The vapor pressure of pure water and pure ethanol at 25 \deg C are 24 Torr and 44 Torr, respectively. Suppose you have a water - ethanol mixture and the total vapor pressure is 31.2 Torr. Sucrose, C12H22011, is a non-volatile solute that will not contribute to the total vapor pressure. When 0.03 moles of sucrose is added to the water - ethanol mixture, the vapor pressure drops to 29.8 Torr. How many moles of water are present in the solution?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

4. The vapor pressure of pure water
and pure ethanol at 25 \deg C are 24
Torr and 44 Torr, respectively.
Suppose you have a water - ethanol
mixture and the total vapor pressure
is 31.2 Torr. Sucrose, C12H22011, is a
non-volatile solute that will not
contribute to the total vapor pressure.
When 0.03 moles of sucrose is added
to the water - ethanol mixture, the
vapor pressure drops to 29.8 Torr.
How many moles of water are
present in the solution?

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