Aldehydes And Ketone Lab Report

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LBYCH63, EA 2, Group # 6 Experiment #8: Aldehydes and Ketones Ong Hian Huy, Tiffany Joy Sir Glenn Kelly U. Tan November 11, 2014 November 25, 2014 Abstract Aldehydes and ketones are two similar functional groups containing the carbonyl group. In this experiment, the main objectives are to be able to do qualitative tests on the samples, to be able to write the respective correct chemical reactions for each sample on each test, and to be able to differentiate aldehydes and ketones from one another and from other compounds. The tests were performed by mixing the respective reagents or compounds to each of the samples and then the mixture was observed for a reaction. The oxidation test, and 2,4-DNPJ test confirms that formaldehyde and benzaldehyde…show more content…
Four drops of acetone was then placed inside and the test tube was then shaken thoroughly. The procedure was then repeated to the formaldehyde, cyclohexanone, and benzaldehyde. To the acetone and formaldehyde test tubes, 3 drops of 6M sodium hydroxide was placed since no discoloration was observed after shaking the test tube. It was observed that the acetone turned purple to green to yellow to brown yellow after the sodium hydroxide was mixed with it while the formaldehyde turned yellow brown after the sodium hydroxide was added which indicated a positive result. The cyclohexanone produce red-orange precipitate while the benzaldehyde produced yellow…show more content…
Two drops of iodine- potassium was then added to the mixture. The procedure was repeated with the rest of the samples and isopropyl with varying drops of sodium hydroxide. Eight drops of sodium hydroxide was added to formaldehyde, 9 drops to cyclohexanone, 15 drops to benzaldehyde, and 7 drops to isopropyl. It was observed that both cyclohexanone and benzaldehyde formed a yellow layer that lasted only for a few seconds before disappearing completely while the formaldehyde mixture produce a yellow precipitate. Both acetone and isopropyl mixtures were heated since no precipitate was observed. It was observed that after heating both acetone and isopopyl turned into a cloudy yellow indicating the presence of

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