Save my name, email, and website in this browser for the next time I comment. 5. 9. Q1: Give a source of error in this experiment. A product was dissolved and lost in the washing process. Once the crystals have dissolved, add 25 mL of hot water to the alcohol solution. Aspirin is an ester that has high molecular weight and it not soluble in water hence the solid can be separated by crystallization process. The mechanism of this reaction can be understood by examining the Lewis structures of each reagent. Filtration Flask (1) Generate an infrared spectrum of your aspirin sample (Your instructor will demonstrate how to use the FT-IR. either an acidic or a basic medium. How has synthesis used different temperatures to affect the solubility of aspirin? 01 of 05. Vernier understands that meeting standards is an important part of today's teaching, Experiment #16 from Organic Chemistry with Vernier. Record the mass to the nearest 0.01 g. 4. sulfuric acid. Cover the beaker. In this lab exercise, you can prepare aspirin (acetylsalicylic acid) from salicylic acid and acetic anhydride using the following reaction: salicylic acid (C 7 H 6 O 3 ) + acetic anhydride (C 4 H 6 O 3 ) → acetylsalicylic acid (C 9 H 8 O 4 ) + acetic acid (C 2 H 4 O 2 ). This reduced the strength of the acid and made aspirin easier to ingest. C1 - Calculate the moles of each reagent and determine the limiting reagent for this reaction. Cold water was used to minimize dissolution of the product. Dispose the filtrate it the appropriate waste container. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Additional equipment may be required. The reaction between acid and soap is violent and may destroy clothing. First, collect the chemicals and equipment used to synthesize aspirin: * Be extremely careful when handling these chemicals. Can you see what effect it had on the end product? Make sure the water is close to freezing to minimize product loss. This is accomplished by dissolving the acid in warm ethyl alcohol, adding cold water, and then allowing it to recrystallize in an ice bath. Salicylic acid has a group -OH (an alcohol) and a carboxyl group -COOH (an organic acid). 6. Place the flask in a beaker of hot water for ~ 15 minutes. Prices shown are export prices. Add 6 ml of acetic anhydride and 5-8 drops of 85% phosphoric acid to the flask. Hydrogen is a gas and first element on periodic table? It's strongly recommended that you wash all clothing worn in this lab in a single load without detergent prior to laundering them normally to preserve clothing. The purpose of this experiment is to study the effect that irradiating with microwaves has on the catalysis of aspirin synthesis in terms of reaction time, purity, yield and formation of secondary products.

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