A CHEM350 student was working on her yield determination of her recrystallized p

Question

A CHEM350 student was working on her yield determination of her recrystallized p-aminobenzoic
acid, when some naphthalene was inadvertently spilt into her crystals. You happen along the scene,
and offer the following advice to the distraught student:
a) Redissolve all the solid in dichloromethane, extract with dilute aqueous acid, , re-isolate the
organic compound by precipitating the salt of the base with strong base, and recrystallize your paminobenzoic
acid again.
b) Redissolve all the solid in dichloromethane, extract with dilute aqueous base, re-isolate the
organic compound by precipitating the salt of the acid with strong acid and recrystallize paminobenzoic
acid again.
c) Do either a or b.
d) Discard everything into the hazardous waste container. Nothing can be done.

Explanation / Answer

i will suggest option B

pKa of p-Amino benzoic acid is 4.87

so we can consider as acid and follow as like acid

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