is a method of purifying a compound by removing any 31. impurities that might be mixed with it. It is often used as a final clean-up step, after other methods that are effective at removing larger amounts of impurities, but that do not raise the purity of the final compound to a sufficiently high level. * Sublimation Recrystallization O Decolorization

is a method of purifying a compound by removing any 31. impurities that might be mixed with it. It is often used as a final clean-up step, after other methods that are effective at removing larger amounts of impurities, but that do not raise the purity of the final compound to a sufficiently high level. * Sublimation Recrystallization O Decolorization

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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A lower and/or broader melting point range for a compound after recrystallization most likely results from ________. insoluble impurities such as dust or lint the material still being wet with the recrystallization solvent the compound decomposing in the heated solvent the compound undergoing a chemical reaction with the solvent
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We separated a mixture of sodium carbonate and calcium chloride using Gravity Filtration. Additionally, did vacuum filtration for crystallized Vannilin. However we were not able to recover 100% of the original sample the question is: what do you think are the factors that contribute to low percentage recovery?
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For the liquid acetone, list all IMFs that have to be broken in order for it to mix with water
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How can you tell that a compound is impure? (or pure?) What are the characteristics considered when taking a melting point? What is recrystallization? What is happening on a molecular level (videos are provided) How are solvents chosen for recrystallization? (single solvent or mixed-solvent system).What are the properties of a good solvent system? How are crystals collected?
Based on the melting point of your impure solid, you look at the given samples and believe you havecompound A. Compound A is recrystallized using a mixed solvent system of ethanol and water. You add1 ml of hot ethanol to your sample and it doesn’t completely dissolve. You continue to add hot ethanolbut there isn’t any change. Some solid remains. What should you do next?
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