CHM 2210L Chapter Notes - Chapter 2: Naphthalene, Carcinogen, Allergen
Document Summary
To use acid-base extraction to separate benzoic acid, 4-chloroaniline, and naphthalene. Compounds are separated by immersing them in layers of organic fluid and water. After certain compounds are neutralized by adding the appropriate substance (e. g. acid is neutralized by adding a base), the neutralized compounds dissolve in aqueous solution. The acid is recovered by treating the solution with a strong acid. The following experiment will demonstrate this theoretical concept in practice. For this experiment, three solid substances are initially soluble only in the organic ether to which they are added. Over the course of three purification sequences, the substances are purified one by one. First, the basic r-nh2 substance is combined with an acid which makes it soluble in the water layer. The water layer is removed and its basic nature is recovered by adding naoh to the r-nh2 substance, thus removing the hydrogens added by hcl.
