Which of the functional groups below acts most like an acid in water?

Question

Quizplus · Accepted Answer

The carboxyl group (-COOH) is the most acidic functional group because it can donate a proton (H+) to water, producing a hydronium ion (H3O+). This is due to the presence of two electronegative oxygen atoms, which help stabilize the negative charge on the carboxylate ion (COO-). The other functional groups listed (amino, carbonyl, and hydroxyl) are not as acidic in water.

Which of the Functional Groups Below Acts Most Like an Acid