of Biological Science‚ College of Science‚ University of Santo Tomas‚ Manila‚ Philippines Abstract This experiment is conducted to exhibit the synthesis of banana flavoring in the laboratory through the esterification of isoamyl alcohol and acetic anhydride with the use of the Fischer reaction. The set-up used was the reflux modified with a water bath at the constant temperature between 75-80oCelsius. The actual yield that was attained is 0.4271 grams of banana essence. The theoretical yield‚ on
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Acetyl chloride‚ CH3COCl‚ also known as ethanoyl chloride or acyl chloride‚ is an acid chloride derived from acetic acid. It belongs to the class of organic compounds called acyl halides. It is a colorless liquid. Acetyl chloride does not exist in nature‚ because contact with water would hydrolyze it into acetic acid and hydrogen chloride. In fact‚ if handled in open air it gives off white smoke owing to the hydrolysis from the moisture in the air. The "smoke" is actually small droplets of hydrochloric
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Abstract: The purpose of this lab is to synthesise acetylsalicylic acid (aspirin) by creating a reaction between acetic anhydride and salicylic acid. This was be accomplished through the use of recrystallization. Acetic anhydride and salicylic acid are mixed together‚ and then acidified by the addition of a few drops of concentrated sulfuric acid‚ which catalyzed the reaction. The percent yield is calculated to determine the effectiveness of the reaction in preparing the desired product (aspirin)
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(acetyl salicylic acid) from salicylic acid and acetic anhydride. CO2H OH salicylic acid 2g 0.014 mole O O O CH3 H2SO4 ethyl acetate CO2H O O acetyl salicylic acid acetic acid CH3 O + H3C + H3C OH acetic anhydride 5 mL 0.05 mole The limiting reagent is salicylic acid. The theoretical yield of acetyl salicylic acid is 2.52 g. Physical Data:* mp MW salicylic acid 157-9˚ 138 acetyl salicylic acid 135-6˚ 180 acetic anhydride — 102 acetic acid — 60 sulfuric acid — 98 ethyl acetate
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aspirin was found to be salicylic acid‚ which has the phenolic and carboxylic acid groups that causes irritation in the lining of the stomach‚ mouth and the throat. Thus‚ acetyl anhydride was added to salicylic acid and the reaction synthesises acetylsalicylic acid‚ which contains an ester group. The addition of acetyl anhydride causes the phenolic group in salicylic acid to change to an acetyl group‚ R—OH R—OCOCH3 Hydroxyl group
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the experiment was to synthesize acetanilide by the acetylation of aniline and to purify crude acetanilide product by recrystallization. The group determined water as the recrystallizing solvent. The group performed acetylation of aniline and acetic anhydride for the formation of crude acetanilide. The recrystallizing solvent dissolved the crude acetanilide and was heated in a water bath‚ after heating‚ the solution was cooled in an ice bath causing crystals to form. The percent recovery was computed
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final come which will be discussed in great detail below. The process of the lab included two acid-catalyzed reactions (using BF3(MeOH) and H2SO4).‚ and two catalyzed with bases (anhydrous sodium and pyridine). Salicylic acid was combined with acetic anhydride in four test tubes‚ and one of the four catalysts was added to each. The reactions were monitored and timed to track their rates‚ and then all four test tubes were combined‚ washed in water solution‚ and the aspirin produced was massed. Equation
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Preparation of Fruit Flavors (Pear) Abstract. In this experiment an assigned Ester is prepared‚ particularly n-Propanol. The Preparation was done via Fischer reaction. In this reaction‚ a reflux set-up is required. The reflux set-up was used in the liquid-liquid extraction. After adding an immiscible solution to the compound containing n-Propanol‚ the mixture now will have two layer: the Organic and Aqueous layer. The organic layer is the extract needed and its % yield is computed resulting to
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which is an acid-catalyzed reaction of an alcohol and carboxylic acid. One of the esters known for its characteristic banana flavor is the isoamyl acetate. By using Fischer reaction‚ Isoamyl acetate was produced by refluxing isoamyl alchol and acetic anhydride with the presence of sulfuric acid for 30 minutes. After cooling the mixture‚ cold water was added and it was transferred in a separatory funnel. It was then extracted with immiscible saturated sodium bicarbonate to hasten separation. The sodium
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Date of Experiment: September 10th‚ 2013 Organic Chemistry II – CHLB330 Name: Symone E. MoxeyLab Partner: Lynden Cooper Synthesis of Aspirin (Acetylsalicylic Acid) Abstract:- Aspirin (acetylsalicylic acid) is produced experimentally in the lab. The resulting percentage yield is 65.5%. The purity of the obtained product is tested using the melting point and Ferric Chloride Test (FCT). The aspirin was massed‚ and the melting point was determined. Based on the data collected‚ there was a total
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