Please help me to question 2 46EXPERIMENT 5: PREPARATION OF ASPIRINthe product and then recrystallize it from ethanol/water. Obtain the melting point of therecrystallized product. Finally, weigh the crystals and then determine the % yield based onmass of the sample you are turning in. If you had to do a recrystallization, also calculate the %recovery for the recrystallization step. If recrystallization is not necessary, go to step 4.4. Obtain an IR spectrum using the Buck single beam IR spectrometer. Be sure to get thecomputer to read precise wavenumbers for all the major and/or relevant peaks. Place a coupleof small crystals of the aspirin in a vial and dissolve it in a few drops of methylene chloride(CH₂Cl2). A couple of drops of this solution is placed on the optical reflectance platform, andthe solvent evaporated. This produces very tiny crystals on the platform so that the IR beamreflects off the crystals. Run the spectrum and have the computer subtract the background.5. To check for unreacted salicylic acid in your product, take a small amount of the crystals andput them in a test tube and add several drops of an aqueous FeCl3 solution. Look for theappearance of a dark purple color. If no color appears, then the product contains no unreactedsalicylic acid. Record your test results in your notebook and lab report. Conduct this testwith some salicylic acid to see what a positive test looks like. Record your observations. Turnin your sample of aspirin in a properly labeled polyethylene bag.In your lab report, interpret your IR, compare the experimental MP with what is reported in theliterature, and discuss the results of the FeCl3 test.NOTE: If you obtained an IR spectrum of a solid from the Internet, always check to see whether it isdone as a KBr disc, CCl4 solution or as a nujol mull. Absorptions shown may be due to the mediumrather than the sample itself. It is best to find a spectrum done as a KBr disc, as KBr is transparent inthe IR range.Post-Lab Questions:1. How do you account for the smell of vinegar when an old bottle of aspirin is opened?2. The carbonyls of ketones are expected to absorb around 1715 cm-¹. Why are the two carbonylgroups in aspirin absorbing at different wavenumbers?3. Below is the NMR spectrum of aspirin with signals in regions A, B, and C. Analyze thespectrum by drawing the structure of aspirin and labeling each H with the letter (A through C)to show which signal is produced by which H.14C BN12108A20ppmFRYDE

The question is based on the concept of IR spectroscopy. We need to account for different…

1. How do you account for the smell of vinegar when an old bottle of aspi 2. The carbonyls of ketones are expected to absorb around 1715 cm-¹. Why are the two carbony groups in aspirin absorbing at different wavenumbers? foonirin with signals in regions A, B, and C. Analyze th through C

1. How do you account for the smell of vinegar when an old bottle of aspi 2. The carbonyls of ketones are expected to absorb around 1715 cm-¹. Why are the two carbony groups in aspirin absorbing at different wavenumbers? foonirin with signals in regions A, B, and C. Analyze th through C

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter2: Crystallization

Section: Chapter Questions

Problem 3Q

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