1.) What is the purpose of making derivatives of unknowns? 2.) Give three reasons why acetone...

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Chemistry

1.) What is the purpose of making derivatives of unknowns?
2.) Give three reasons why acetone might interfere with yourresults.
3.) An unknown sample does not react with2,4-dinitrophenylhydrazine reagent, but a color change is observedon reaction with ceric nitrate reagent. Draw the structure of acompound that would give this result.
4.) An unknown sample produces a precipitate upon reaction with2,4-dinitrophenylhydrazine reagent. Draw the structure of acompound that would give this result.
5.) The unknown in question 4 causes Schiff's reagent to turn amagenta color. Draw the structure of a compound that would givethis result.
6.) An unknown sample produces a reddish precipitate uponreaction with 2,4-dinitrophenylhydrazine reagent, no color changewith Schiff's reagent, and a yellow precipitate when mixed withiodine and base. Draw the structure of a compound that would givethis result.
7.) Using chemical tests how would you distinguish among1-pentanol, 2-pentanone, 3-pentanone, and pentanal?
8.) Draw the 1H NMR spectrum of 2-pentanone. Include chemicalshifts, splittings, and areas of signals

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Answers1 What is the purpose of making derivatives ofunknownsA derivative of an unknown provides the final evidence in theidentification and confirmation for the functional group in theunknown compound The melting point of the derivative of unknown isan additional physical constant for comparison with known standardvalueUsually crystalline derivatives such as a semicarbazone or24dinitrophenylhydrazone derived from aldehydes or ketones areprepared as a simple way of verifying the identity of the originalcompound2 Give three reasons why acetone might interfere withyour resultsAcetone is a simple methyl ketone It may interfere with24dinitrophenylhydrazine See Answer

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