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Investigate the chemical properties of alkanals and alkanones.
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Carmen Tse 7C 21 Experiment No. 21 Chemical Properties of Alkanals and Alkanones 07-10-2003 Objective To investigate the chemical properties of alkanals and alkanones. Introduction Alkanals (aldehydes) and Alkanones (Ketones) are both carbonyl compounds containing the functional group. They have similar structures thus similar properties. However, in aldehydes, the carbonyl carbon is bonded on one side to a hydrogen atom, and the other side can be a hydrogen atom, an alkyl or an aryl group. The general formula for an aldehyde is: For ketones, the carbonyl carbon is bonded to two carbon chains. The general formula for a ketone is: Due to the different atom or compound bonded to the carbonyl carbon, the properties of the carbonyl compounds vary from one to another in some ways. In this experiment, five carbonyl compound: ethanal, methanal, Benzaldehyde, Propanone, and phenylethanone are reacted with: A. sodium hydrogensulphite for nucleophilic addition B. 2, 4-dinitrophenylhydrazine for condensation C. Potassium dichromate for oxidation and D. Iodine in...
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