two unknown compounds were found in the hood in your lab and labeled only as c3h
ID: 961774 • Letter: T
Question
two unknown compounds were found in the hood in your lab and labeled only as c3h60 without any other markings. determine the identity and condensed structural formulas based on the following chemical test that were preformed on the unknown compounds
a) unknown 1 forms a red orange precipitate with the Benedict reagent but does not yield a positive test for the iodoform test.
b) unknown 2 yields a positive test or yellow solid from the iodoform test but does not react with the Benedict reagent to produce a positive test
Explanation / Answer
Benedict reagent = It is used to identify the presence of aldehyde groups.
Iodoform test = It is used to identify the presence of -COCH3 group.
Therefore,
a) Unknown 1 = CH3CH2CHO
It forms a red orange precipitate with the Benedict reagent but does not yield a positive test for the iodoform test.
b) Unknown 2 = CH3COCH3
It yields a positive test or yellow solid from the iodoform test but does not react with the Benedict reagent to produce a positive test.
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