Question

can you help

with part b

why isn't the product pure based on the melting point???

for part c the experiment was

Separation of acid/base/neutral compounds using liquid- liquid extraction of benzocaine-trans-cinnamic acid and biphenyl

what was the purpose of using Na2SO4

estion 6: 100mg of each Acid, Base and Neutral compounds were used. Assuming 70mg mzocaine, 66mg trans-cinnamic acid and 50mg of biphenyl were isolated. a. Calculate % recovery of benzocaine, trans-cinnamic acid and biphenyl respectively. (show your calculation, 15 points): 50 00 b. If the experimental melting point of benzocaine is 75-80°C, is your product pure? Why or why not? (4 points) reduct uit pure, because the melting point range has a solffene pont would be much lower and the range will be an C. What's the purpose of Na2SO4? (3 points)

Answer 1

Answer to Part-B: The melting point of benzocaine is 88–90 °C. And experimental observation is 75-80 °C. The product was not pure. Because if the product was pure, it melts sharply at 88–90 °C. 10 °C difference is too big in terms of purity.  

Answer to Part-C: In the laboratory, anhydrous sodium sulfate is widely used as an inert drying agent, for removing traces of water from organic solutions. It is more efficient but slower-acting than the similar agent magnesium sulfate.

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