Introduction The functional group of carboxylic acids consists of a C=O with-OH bonded to the same carbon. -Carboxyl group is usually written-COOH. -Aliphatic acids have an alkyl group bonded to -COOH. -Aromatic acids have an aryl group. -Fatty acids are long-chain aliphatic acids. Chapter 20 2 Chapter 20 2 Introduction ▪ The functional group of carboxylic acids consists of a C═O with —OH bonded to the same carbon. ▪ Carboxyl group is usually written —COOH. ▪ Aliphatic acids have an alkyl group bonded to —COOH. ▪ Aromatic acids have an aryl group. ▪ Fatty acids are long-chain aliphatic acids