Final W09 Key

Noneoftheabove 9

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Unformatted text preview: liquids which cannot be separated by distillation d. a mixture of two liquids e. None of the above 8. In general, how do impurities affect the melting point and range? a. They increase both b. They decrease both c. Melting point increases but the range decreases d. Melting point decreases but the range increases e. None of the above 9. Let’s say that 1.5 g ethyl acetate (88.105 g/mol, 0.897 g/mL) is allowed to react with 2 mL of a 5.0 M solution of NaOH (40.04 g/mol) to give acetic acid (60.05 g/mol). What is the limiting reagent? a. Ethyl acetate b. NaOH c. Water d. Both ethyl acetate and sodium hydroxide are in equal amounts so they are both limiting e. None of the above 10. You have two unlabeled bottles of chemicals that exhibit the same melting point. You know the identity of the two compounds, but you don’t know which is which. What process explains the easiest method to determine which is which considering you have standard samples of each as well? a. Mix both unknowns together and take a melting point b. Mix e...
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This note was uploaded on 05/17/2011 for the course CHEM 6al taught by Professor Pettus during the Spring '08 term at UCSB.

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