When water and methanol, CH3OH(l), are mixed, thetotal volume of the resulting solution is not equal to thesum of the pure liquid volumes. (Refer to Exercise 99for an explanation.) When 72.061 g H2O and 192.25 gCH3OH are mixed at 25 °C, the resulting solution hasa density of 0.86070 g/mL. At 25 °C, the densities ofwater and methanol are 0.99705 g/mL and 0.78706g/mL, respectively.(a) Calculate the volumes of the pure liquid samplesand the solution, and show that the pure liquid volumes are not additive. [Hint: Although the volumesare not additive, the masses are.](b) Calculate the molarity of CH3OH in this solution.
When water and methanol, CH3OH(l), are mixed, thetotal volume of the resulting solution is not equal to thesum of the pure liquid volumes. (Refer to Exercise 99for an explanation.) When 72.061 g H2O and 192.25 gCH3OH are mixed at 25 °C, the resulting solution hasa density of 0.86070 g/mL. At 25 °C, the densities ofwater and methanol are 0.99705 g/mL and 0.78706g/mL, respectively.(a) Calculate the volumes of the pure liquid samplesand the solution, and show that the pure liquid volumes are not additive. [Hint: Although the volumesare not additive, the masses are.](b) Calculate the molarity of CH3OH in this 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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When water and methanol, CH3OH(l), are mixed, the
total volume of the resulting solution is not equal to the
sum of the pure liquid volumes. (Refer to Exercise 99
for an explanation.) When 72.061 g H2O and 192.25 g
CH3OH are mixed at 25 °C, the resulting solution has
a density of 0.86070 g/mL. At 25 °C, the densities of
water and methanol are 0.99705 g/mL and 0.78706
g/mL, respectively.
(a) Calculate the volumes of the pure liquid samples
and the solution, and show that the pure liquid volumes are not additive. [Hint: Although the volumes
are not additive, the masses are.]
(b) Calculate the molarity of CH3OH in this solution.
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