Answers on the other side of the page will not be graded!! 1. Multiple choice an

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Answers on the other side of the page will not be graded!! 1. Multiple choice and short answers: (36 pts) 1) Read carefully the questions and give your answer in the space provided for each proble Which of the following statements is false? a) anhydrous sodium sulfate is used as a drying reagent b) distillation separates molecules based on their polarity c) distillation under reduced pressure produces a lower boiling point d) extraction is based on the acid-base properties of compounds e) none of the above 2) The organic compound shown below could be extracted into water from an organic solvent using _ and then removed from water into an organic solvent by the addition of a) sodium hydroxide, sodium bicarbonate b) ammonia, sodium hydroxide c) hydrochloric acid, sodium hydroxide d) sodium bicarbonate, sodium hydroxide e) none of the above 3) Circle the compound that would yield the following combination of qualitative test: positive Jones test, positive bromine test, and negative Lucas test. OH CH3 CH2OH 4) Which is not a requirement of a recrystallization solvent? a) Easily removed by evaporation or boiling. b) Has a boiling point lower than the melting point of the solid. c Impurities are nearly insoluble at all temperatures. d) The recrystallized solid is soluble at high temperatures, but nearly insoluble at low temperatures e) All of the above are requirements. 5) After separating the aqueous and organic layers, how was the acid separated from its solvent. a) The water was evaporated on a hot plate. b) The ether was evaporated on a hot plate. c) The aqueous layer was agitated with a stirring rod until the acid precipitated, after which is was filtered from the solution. d) NaOH was added to the aqueous layer, causing the acid to precipitate after which it was filtered from the solution. e)

Explanation / Answer

1.Option B, since it is based on boiling point

2. Option D, NaHCO3& NaOH

3. Option D, phenol won't give Lucas test

4. Option C

5. Option D, by neutralizing with NaOH followed by filtration

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