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1.) What is the purpose of making derivatives of unknowns?
2.) Give three reasons why acetone might interfere with your results.
3.) An unknown sample does not react with 2,4-dinitrophenylhydrazine reagent, but a color change is observed on reaction with ceric nitrate reagent. Draw the structure of a compound that would give this result.
4.) An unknown sample produces a precipitate upon reaction with 2,4-dinitrophenylhydrazine reagent. Draw the structure of a compound that would give this result.
5.) The unknown in question 4 causes Schiff?s reagent to turn a magenta color. Draw the structure of a compound that would give this result.
6.) An unknown sample produces a reddish precipitate upon reaction with 2,4-dinitrophenylhydrazine reagent, no color change with Schiff?s reagent, and a yellow precipitate when mixed with iodine and base. Draw the structure of a compound that would give this result.
7.) Using chemical tests how would you distinguish among 1-pentanol, 2-pentanone, 3-pentanone, and pentanal?
8.) Draw the 1H NMR spectrum of 2-pentanone. Include chemical shifts, splittings, and areas of signals
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