Final6A - The breakdown you gave us for the final is this:...

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The breakdown you gave us for the final is this: 15 questions m.p., sublimation, b.p., separation, etc. 10 chromatography 5 basic terminology (glassware, vocab) 15 IR 15 MS 20 NMR (both C-13 and H-1) 20 Polarimetry, UV, library Vocab, terminology, basic concepts Match the following glassware. 1. Air Condenser 2. Conical Vial 3. Gas Delivery Tube 4. Hickman Still 5. Claisen Adapter 6. Round Bottom Flask 7. Reflux Condenser 8. Magnetic Spin Vane 9. Drying Tube
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10. Craig Tube 11. Büchner Funnel 12. Vigreux Column 13. Separatory Funnel 14. Magnetic Stir Bar 15. Syringe 16. If a solid possesses a sublimation point that is lower than it's melting point, how is it possible to determine the melting point of the compound? a. Increase the temperature rapidly on the melting point apparatus b. Depress the melting point of the substance by adding impurities c. Seal the capillary tube to increase the pressure when heated d. It is not possible to obtain the melting point 17. Condensation involves the phase change of ________ to ________ ? a. solid; liquid b. liquid; gas c. solid; gas d. gas; liquid 18. Pure organic molecules possess which of the following? a. Broad melting point range b. Lowered melting point range c. Narrow melting point range d. A eutectic melting point range 19. How much does a 3 mL sample weigh if the density is 2.8? a. 8400 mg b. 0.93 g c. 1070 mg d. 5800 mg 20. If butyl propyl ether is placed in a separatory funnel containing dichloromethane and 3M HCl, in which layer will the organic compound reside? a. ether layer
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b. aqueous acid layer c. top layer d. it forms a precipitate with acid 21. What does the "3M" in 3M HCl describe? a. Molality b. Miscibility c. Molarity d. Microscopy 22. If p -aminobenzoate is placed in a separatory funnel containing ether and 3M HCl, in which layer will the organic compound reside? a. aqueous acid layer b. bottom layer c. organic layer d. it forms a precipitate 23. Which of the following would be the best method to separate benzene from toluene? a. Sublimation b. Simple Distillation c. Recrystallization d. Liquid-liquid extraction 24. Drying an organic compound involves the removal of _________ ? a. Solid impurities b. Water c. Organic solvents d. Immiscible residues 25. Which of the following would be the fastest method to separate aniline from butyric acid? a. Sublimation b. Recrystallization c. Distillation d. Liquid-liquid extraction 26. Which of the following melting point ranges is indicative of a eutectic mixture? a. Narrow melting point range b. Broad melting point range c. Stealth-like melting point range
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d. Enhanced melting point range 27. Sodium sulfate is a weak base? a. True
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This note was uploaded on 04/21/2010 for the course CHEM Chem 6BL taught by Professor Pettus during the Fall '05 term at UCSB.

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Final6A - The breakdown you gave us for the final is this:...

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