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Identification of an organic unknown
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| Submitted: Thu Jul 11 2002
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Amar Mohammed 13.1 March 2002 Mr Buckle Centre Number: 20093 Candidate Number: 5074 Chemistry A2 Coursework Identification of an organic unknown (Skill A) Findings after undertaking the experiment using my flow chart. WET TESTS When I put the universal indicator into the test tubes containing the unknown, there was no colour change. This indicated instantly that the unknown was not a phenol or a carboxylic acid. However, the IR of the unknown suggested that it was not a phenol because there was no strong, broad absorption at 3200-3600 cm-1 on the IR of the unknown. I then added 2-4 dinitrophenylhydrazine to the unknown I observed a deep yellow/orange precipitate. This then told me that the functional group present could be an aldehyde or a ketone. I then added tollen's reagent to the unknown. After heating the unknown with the reagent, I observed a silver mirror forming on the sides of the test tubes from the solution. This...
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