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Unformatted text preview: David Tsai The Formation of an Ester lab 26 Jan 2010 Purpose: To explore the acid catalyzed reaction between an alcohol and a carboxylic acid to produce esters. Variables: Independent- Amount of n-propyl alcohol and acetic acid Dependent- Amount of ester produced Control- Temperature Materials: Small reaction vial Hot water setup Ice water setup Beral-type pipet (2) Pasteur pipet (2) Test tube and cork stopper, 15 x 150 mm Copper wire handle Small graduated cylinder n-Propyl alcohol Acetic acid, glacial Sulfuric acid, concentrated Sodium carbonate Distilled water Procedures: Set up a 400 mL hot water bath. Add 1.2 mL of n-propyl alcohol and 2.5 mL of glacial acetic acid to a small reaction vial. Add 5 drops of concentrated sulfuric acid to the reaction vial. Seal the vial. Mix the reaction mixture by inverting the vial several times. Place the vial in the water bath for 25 minutes. Remove the vial. Place the vial in an ice-water bath for 3 minutes. Open the reaction vial. Pour the contents of the vial into a small test tube containing ice minutes....
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