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Chapter 3%2c Crystallization Answers H Questions (1)
Course: CHEM 2445, Spring 2012School: UConn
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to Answers Questions Chapter 3, Crystallization. 1. The gray color of the naphthalene is due to traces of decolorizing charcoal. It can be removed by filtration through fine filter paper. 3. Activated carbon is added to adsorb high-molecular-weight impurities, which are often colored and relatively soluble. less 5. A mixture of solvents is used when no single solvent has the desired property of rendering the...
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to Answers Questions Chapter 3, Crystallization. 1. The gray color of the naphthalene is due to traces of decolorizing charcoal. It can be removed by filtration through fine filter paper. 3. Activated carbon is added to adsorb high-molecular-weight impurities, which are often colored and relatively soluble. less 5. A mixture of solvents is used when no single solvent has the desired property of rendering the substance soluble when hot and insoluble when cold. 9. Vacuum filtration is a much more efficient method for removing solvent from the crystals than is gravity filtration.
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