You have completed a synthesis and are now obtaining a melting point of the synthesized compound. The literature melting point is 126.2 °C - 128.4 °C. You determine the melting point to be 121.5 °C - 126.8 °C with a run at 2 °C per minute. You also determine that there is an erroneous signal in your IR spectrum. Which statement most accurately describes what you have going on here? O Your compound is not pure and is undergoing melting point depression. You may have added too much sample. None of these are correct. You may have added not enough sample. O There isn't an issue here, melting points are off all of the time.

1.Calculate the theoretical yield of acetylsalicylic acid from the given starting amount of salicylic acid. Show the calculation with units.   Given: 1.4 g of your salicylic acid product in a 125 mL Erlenmeyer flask; record the weight Next, briefly explain if possible:What key change do you expect to see in the IR spectrum when the salicylic acid starting material is converted to the acetylsalicylic acid product?And or: What key change do you expect to see in the 1H NMR spectrum when the salicylic acid starting material is converted to the acetylsalicylic acid product?

Please help

Match the peaks in this spectrum with the carbons on the structure below. Feedback: Your submission: B) I: 60.9 ppm You have incorrectly identified which atoms are responsible for the peaks in this spectrum. Review a correlation chart to predict chemical shifts. II: 25.1 ppm I: .2 рpm IV: 11.6 ppm Question 13 of 18 Match the peaks in this spectrum with the carbons on the structure below. A) I: 25.1 ppm II: 60.9 ppm II: 33.2 ppm IV: 11.6 ppm B) I: 60.9 ppm II: 25.1 ppm II: 33.2 ppm IV: 11.6 ppm C) CI I: 25.1 ppm II: 60.9 ppm I | |I IV III: 11.6 ppm IV: 33.2 ppm D) I: 11.6 ppm II: 60.9 ppm III: 25.1 ppm IV: 33.2 ppm

Based on the lettering system, please assign these letters to these peaks on real proton NMR

Answer the question concisely. Maximum of 5 sentences.   Differentiate spectroscopy and spectrophotometry. Cite an example and discuss it in a chemical perspective.

A student needs to prepare a ¹H NMR sample for an organic compound soluble in chloroform (CHCI3). The student cannot use CHCI 3 as the solvent for the sample, but rather uses deuterated chloroform (CDC13) because: O CDC13 is more polar. O CDC13 will not produce a signal in the ¹H NMR spectrum, and therefore will not mask the signals of the compound. O The compound will be more soluble in CDCI 3. O CDC13 is cheaper than CHCI 3.