synthesis of aspirin lab answers

Average melting point The percent yield is the actual yield of a product given as a percentage of the theoretical yield (Kirk, 2013). 1.081g of Salicylic acid was obtained after the first synthesis. After the solid dissolved, added about 15 mL of distilled water. Compare the literature melting point and infrared spectrum to the experimental and comment on the purity of your aspirin. 57- 60°C Rinsed the dirty apparatus thoroughly with lots of water.

Aspirin is an organic ester. Spell. Recorded the weight on the data sheet. D. Slap? Purify the rest of the aspirin by recrystallization. This is accomplished by dissolving the acid in warm ethyl alcohol, adding cold water, and then allowing it to recrystallize in an ice bath. Molar mass of acetic anhydride = 4(12.01) + 6(1.008) + 3(16) = 102.088g Molar mass of salicylic acid = 7(12.01) + 6(1.008) + 3(16) = 138.118 g, Acetic anhydride: 5.4g C4H6O3 x 1 mole C4H6O3 l= 0.052895541 moles C4H6O3, Salicylic acid:1.51g C7H6O3 x 1 mole C7H6O3 = 0.01093268 moles C7H6O3138.118 g C7H6O3. Rinse the residue on the filter paper with 2 mL of ice-cold deionized water. The accuracy of this lab could be improved with more precise equipment, allowing the experimenter to be more confident in the accuracy of the measurements obtained. Describe one safety practice important to this lab experiment; explain you answer specific to the chemistry and procedures used in this lab. Small splashes of acid may go unnoticed on your clothing until the clothing is treated with soap. PLAY. The results displayed a percent yield of 34.3%, from a theoretical yield of about 1.97g of aspirin and an actual yield of approximately 0.68g of aspirin. In this experiment, you will prepare aspirin from salicylic acid and acetic anhydride using sulfuric acid as a catalyst. PhDessay is an educational resource where over 1,000,000 free essays are collected. The main objective of the synthesis of aspirin lab was so produce aspirin (acetylsalicylic acid) through the reaction of salicylic acid and acetic anhydride. c. Tropical

Section I – Procedure: summarize the procedure using a flow chart format.

The salicylic acid was a find, white solid powder. I have a 1993 penny it appears to be half copper half zink is this possible? Add 5 mL (0.05 mole) of acetic anhydride, followed by 5 drops of conc. 10. It was thin, short white crystals and had a melting point range or 154-155 degrees Celsius. Heat it for fifteen minutes with occasional stirring. Measured out 5 mL of ethanol from the fume hood in a graduated cylinder, and added it to the 100 mL beaker containing the solid aspirin. ), ____________ Mass of flask with stopper + salicylic acid, ____________ Mass of flask with stopper + salicylic acid + acetic anhydride, Identify the limiting reactant __________________________________, ____________ Calculate the theoretical moles of aspirin, ____________ Calculate the theoretical mass of aspirin in grams, ____________ Mass of filter paper (Büchner funnel, after recrystallization), ____________ Experimental mass of aspirin in grams, ____________ percent yield of aspirin = experimental mass of aspirin x 100 / theoretical mass of aspirin, ____________ Experimental melting point of aspirin, ____________ Literature melting point of aspirin (you must look this up with CRC or online). SYNTHESIS OF ASPIRIN (acetylsalicylic acid) Place 2.0 g (0.015 mole) of salicylic acid in a 125-mL Erlenmeyer flask. Why the polls were wrong about Trump (again), 'Stop the count': Trump backers rally at vote centers, Live: Biden moves closer to reaching 270 votes, Union members picked Biden after Trump 'abandoned' them, Fox News hosts question network's Ariz. call for Biden, Black men drifted from Dems to Trump in record numbers, Falcons player is brutally honest after not being traded, Pennsylvania AG on Trump lawsuit: 'We'll win again', Trump campaign unleashes wave of suits in key states, Giants trainer may have saved this player's wife's life, Democrats disappoint in House and Senate races. 1. Synthesis of Diphenylacetylene Observation of Results: Part 3: Preparation and Standardization of HCl Procedure Part 4: Quantitative Analysis of Aspirin Further Analysis Conclusion The overall objectives of After the 6 minutes elapsed, 10 mL of distilled water was added to the Erlenmeyer flask and placed in the ice water, avoiding getting any of the ice water in the Erlenmeyer flask. 12. = 1.969566168g Aspirin. Recorded the volume of acetic anhydride used on the data sheet. Lab B - Synthesis of Aspirin.

STUDY. 58. Filter the crystals by vacuum filtration. The aspirin formed will be contaminated with acetic acid and must be purified by recrystallization. Meltemp, Salicylic acid H 2 SO 4 (use a dropper, H 2 SO 4 is highly corrosive) and swirl the flask gently until the salicylic acid dissolves. The chemical name for aspirin is acetylsalicylic acid. Introduction Cinnamaldehyde, cinnamic aldehyde or 3-phenyl-2-propenal is the. This comes from his winnings against their past opponents giving support on. Scholars Prepared another ice water mixture in the 250 mL beaker and placed the 100 mL beaker in the ice water. C2 - Using the limiting reagent calculate the maximum theoretical yield for your reaction. Section VI – Post-lab: Give a source of error in this experiment. The theoretical yield is the amount of a product formed when the limiting reactant in completely consumed, and is the maximum amount that can be produced from the amount of reactants used in the reaction. The aspirin is allowed to dry, weighed, and then the percent yield is calculated. Weigh a clean, dry, 125 mL Erlenmeyer flask with a rubber stopper and record its mass. It has been present for over one hundred years and is one of the most widely used medications in the world. Percent yield can use them for free to gain inspiration and new creative ideas for their writing assignments.

Filtration Flask (1) The limiting reactant of the equation was salicylic acid. * Using the literature, obtain an IR spectrum for aspirin and compare it to the one generated using the FT-IR in your lab. That is to say, a reaction can only occur until one reactant is used up (Kirk, 2013). (Hint: remember that this procedure occurred under the heading, Purification. Either concentrated sulfuric or phosphoric acid may be used. It is a pain reliever and a non-steroidal anti-inflammatory (NSAID). 16. Get Your Custom Essay Placed a few boiling chips in the beaker to prevent bumping if the water began to boil. Weigh it again. Determine the mass of the aspirin. Inaccurate calibrations of the hot plate or balance could have shown higher or lower quantitative data which would have affected the results by producing either a higher or lower percent yield. After the limiting reactant was determined, the theoretical yield of aspirin was calculated at approximately 1.97g. Cell lysis buffer molecular weight and volume or weight of reagents needed ?

Thermometer (1) For example, Tony Parker is a good person with a good heart wherein he helps those needy people.

The reaction between acid and soap is violent and may destroy clothing.

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