Question

4. Neuroscientists believe that the only chemical in chocolate that may have a feel-good effect on the human brain is phenylethylamine (PEA). Although the PEA in chocolate occurs naturally, PEA can be made in the laboratory by the following reaction: CH,NO, + C,H,O – C,HN + CO, + H,0 phenylethylamine ammonium formate acetophenone phenylethylamine (PEA) How much PEA can be made from 75.0g of ammonium formate and 125g of acetophenone? What mass of the excess reactant remains? Complete your own BCA table and show your work underneath. Equation: CH.NO, C,H,O | C,HN + CO2 + H2O

Answer 1

Starting material/product	Molecular weight	Amount taken	Moles	Equivalent used
Acetophenone	120 (d=1.03)	125 g	1.04	1
Ammonium formate	63	75 g	1.19	1.14
Phenylethylamine	121.18 (d=0.964)	126.22 g

120 gm of Acetophenone gives 121.18 gm of Phenylethylamine

Then 125 gm of Acetophenone gives x gm of Phenylethylamine

Theoretical yield of the given reaction = (125*121.18)/120 = 126.22 g

126.22 gm of final product can be obtained from the given reaction