You attempt to perform the bromination of trans-cinnamic acid shown below. You decide to take an IR spectrum of your product and see a strong, broad signal at 3500 cm-1. Is this signal definitive proof of a successful reaction? (2 pts) select all that apply
No, because the IR spectrum of the starting material would have that stretch while the IR spectrum of the product would not
Yes, because the IR spectrum of the product would have that stretch while the IR spectrum of the starting material would not
No, because the IR spectra for both the starting material and product would have that stretch
Yes, because the IR spectrum of the starting material would have that stretch while the IR spectrum of the product would not
Why is it important that all of the solids dissolve during the reflux period for you to obtain a good yield of product?
A. Because everything needs to be in solution for the reaction to happen to the fullest extent.
B. Because the product will be impure if the intermediate doesn't dissolve completely.
C. Because the ethanol will evaporate off if it's not dissolved.
D. All of the above
What is the gas that is evolved during neutralization?
A. O2
B. CO2
C. SO2
D. CO3
Why is it necessary to neutralize the reaction mixture to work up the product?
A. Because it is dangerous to work with an acidic solution.
B. Because after the addition of ethanol and sulfuric acid, the benzocaine exists as ammonia and must be protonated so that it becomes insoluble and collectable.
C. Because after the addition of ethanol and sulfuric acid, the benzocaine exists as a soluble carboxylic acid and must be neutralized so that it becomes insoluble and collectable.
D. Because after the addition of ethanol and sulfuric acid, the benzocaine exists as a soluble ammonium salt and must be neutralized so that it becomes insoluble and collectable.
If you end up adding 1.5 mL of concentrated sulfuric acid (18 M), how many mL of 10% aqueous sodium carbonate would be required to neutralize the reaction mixture?
