How would you separate a mixture of benzene, benzoic acidand pyridine using an extractive procedure?
Benzoic acid is a weak acid with a pKa of 4.2 and can be dissolved in aqueous base
Pyridine is a weak base with a pKa of 5.5 (pka of conjugate acid of pyridine) and can be dissolved with aqueous acid.
Benzene is niether acidic or basic and is insoluble in water at any pH.
This problem discusses the separation of an acid, a base and a neutral compound using a simple extraction. It involves concepts such as pH and Pka.