why is acetic acid added after homogenization in extraction and isolation

Both pyridine and pyrrole are nitrogen containing aromatic heterocyclic compounds. When treated with HCl, only pyridine forms the hydrochloride salt, where as pyrrole is unreactive. What is the best explanation for this observed reactivity.

3. Provide a synthesis of methyl benzoate from benzene and any alcohol.

3. How would you separate these three molecules from one another utilizing acid/base extractions and ethyl acetate as your organic layer? You can use 10% HC1 (aq.), 10% NaOH (aq.), and 30% NaHCO3 (aq.) as your acids and bases. NH2 HO HO, OH OH ÓH OH

drug synthesis from Sonogashira cross-coupling reaction