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Lab report - polar) and insoluble in water. 4. Which of the...

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CHEM133 TA: Allen Ng 2. Identify the common structural features of ethanol and 1-decanol. Identify the feature of each liquids which accounts for its solubility in water, and in hexane. Explain the basis for any differences in their solubility behavior in these solvents. a. Ethanol and decanol both are partially polar and non-polar due to their structure which contains both hydro-carbons (non-polar) and hydroxyl (polar) groups. Because polar dissolves in polar and non-polar in non- polar thus the non-polar components of the molecules will be able to dissolve in hexane(non-polar) and the polar in the water(polar). 3. Identify common structural features of toluene and naphthalene. How do(es) the(se) feature(s) account for the solubility behavior of both solutes in water and hexane? a. Toluene and naphthalene are both composed of solely hydrocarbon compounds which make them non-polar, thus soluble in hexane(non-
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Unformatted text preview: polar) and insoluble in water. 4. Which of the following are able to hydrogen bond with water: ethanol, 1-decanol, glycerin, sucrose and urea? For each, identify the structural feature which accounts for its ability to hydrogen bond. Explain how H-bonding influences the solubility of each in water; and in hexane. a. All of the above molecules are able to hydrogen bond with water due to their hydroxyl compounds, which they all have in their molecule. The hydrogen has a partial positive charge which bonds to the partial negative of the oxygen, thus able to dissolve in water but not in hexane because it is non-polar. 5. The solubility of the eight ionic salts in water was compared: a. What feature is common to all salts which are soluble in water? b. What feature is to common to salts which are either only slightly soluble in water, or are insoluble?...
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This note was uploaded on 10/04/2011 for the course CHEM 132 taught by Professor Jones during the Fall '08 term at Maryland.

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