sketch the structural formulas for some common aromatic acids, benzoic and salicylic acid. Show how to form the sodium salt of the acids using a sodium hydroxide base. Discuss how the salicylic acid was used originally as an analgesic. Show how the salicylic acid was changed to the sodium salicylate which was much more easy on the stomach. Discuss how the sodium salicylate was chemically changed to the acetyl salicylic acid molecule, which is known as aspirin. Discuss the effects of each of the analgesics.