9. You are required to separate the three components of this mixturr, following

Question

9. You are required to separate the three components of this mixturr, following the step-by-step procedure benzoic acid, phenol and benzene.

a. you dissolve 5g of this mixture in a 50ml of ether and transfer the mixture to a separatory funnel. add 20ml of water to separatory funnel. which layer is the organic layer?
b. Then you add 20ml of 10% solution of sodium bicarbonate to the separatory funnel, stopper and cautiously mix the contents. vent the liberated gas and shake the mixture vigoursly with fre?quent venting of the funnel. what is the liberated gas?
c. you allow the layers to separate completely and then draw off the aqueous layer into a 100ml erlenmyer flask(labeled flask 1) what compund does this layer have. In what structural form does this compound exist in flask 1

Explanation / Answer

a)

aqueous layer --> water (benzoic aicd + pehnol)

organic layer --> benzene

b)

the gas is most likely CO2(g)

since

Benzoic acid + NaHCO3 = Na+ + CO2(g)+ H2O(l) + benzoate

c)

aqeuoeus layer --> phenol + benzoate

organic layer --> benzene

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