Acetic acid contains two distinct types of carbon-oxygen bonds due to the presence of both a carbonyl group and a hydroxyl group. The acetate ion, formed by ionization of acetic acid, only contains one type of carbon-oxygen bond in the carboxylate group.
Acetic acid, CH3COOH, contains two distinct types of carbon-oxygen bonds because it has both a carbonyl group (C=O) and a hydroxyl group (-OH). The carbon atom in the carboxyl group is double bonded to one oxygen atom and single bonded to the other oxygen atom, forming a carbonyl and a hydroxyl group.
On the other hand, the acetate ion, which is formed by ionization of acetic acid, only contains one type of carbon-oxygen bond because it only has a carboxylate group (COO-) with a double bond between the carbon and one oxygen atom.