ch 136 EXPERIMENT 6

ch 136 EXPERIMENT 6 - EXPERIMENT 6 INDENTIFICATION OF...

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EXPERIMENT 6 INDENTIFICATION OF ALDEHYDES AND KETONES Name: Dhara Patel Date: March 14, 2008 Objective: To synthesize aspirin and determine the likelihood of the synthetic method using percent yield of purified aspirin over the theoretical value. The purity of the product is confirmed by measuring its melting point range. by using several of reagents to distinguish aldehydes from ketones from given representative compounds and to determine the melting point of the derivative. Discussion: In this lab, four representative compounds were given: propanal, acetone, acetophenone and ethyl acetate. Various reagents such as Schiff’s Reagent, Tollens Reagent, Fehling Reagent and 2,4-Dinitrophenylhydrazine Reagent assisted to distinguish aldehydes and ketones by certain compound’s reaction. In Schiff Reagent, propanal and acetone turned pink proving positive test for aldehydes. Tollens Reagent forms a deposit of metallic silver which showed negative observation for all given compounds and the unknown.
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