Why Is Benzoic Acid Slightly Soluble in Water?
Benzoic acid, chemical structure C6H5COOH, is the uniting of the water insoluble benzene molecule (with one hydrogen atom dropped) with a carboxylic acid group, (-COOH). It is this carboxylic acid group that gives benzoic acid its measure of water solubility. This has to do with “ionizability.” Water can attach to benzoic acid by hydrogen bonding. Beyond that, water molecules can stabilize the formation of the “benozate” ion.