EBK MACROSCALE AND MICROSCALE ORGANIC E
EBK MACROSCALE AND MICROSCALE ORGANIC E
7th Edition
ISBN: 8220101437488
Author: Williamson
Publisher: YUZU
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Chapter 5, Problem 7Q

In fractional distillation, liquid can be seen running from the bottom of the distillation column back into the distilling flask. What effect does this returning condensate have on the fractional distillation?

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A 10.00 mL sample of ethanol is added to 250.0 mL of water in order to observe the freezing point depression of the water. Consider the possible errors in this experiment, and determine whether each would cause the freezing point of the water to increase, decrease, or remain the same compared with the expected results. It is discovered that the 10.00 g ethanol sample is actually 95% ethanol and 5% water.   The ethanol sample is left out for several minutes before being added to the water, allowing a significant amount to evaporate.   Instead of starting the experiment with room temperature water, the experiment is started with cold water.   Some of the water is splashed out of the container before the ethanol is added.   Some of the ethanol and water solution is spilled out of the container during temperature measurement.
1. Which is more efficient for separating the components of a liquid mixture of a liquid mixture, simple or fractional distillation? Why? 2. Explain (in 1 – 3 sentences) how distillation works in separating simple mixtures.
A solution of 5.00 g acetic acid in 100 g benzene freezes at 3.38C. A solution of 5.00 g acetic acid in 100 g water freezes at -1.49C. Find the molecular weight of acetic acid from each of these data. What can you conclude about the state of the acetic acid molecules dissolved in each of these solvents?
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Solutions: Crash Course Chemistry #27; Author: Crash Course;https://www.youtube.com/watch?v=9h2f1Bjr0p4;License: Standard YouTube License, CC-BY