Now, monoprotic acid is an acid that can donate a single H plus ion. Let's look at a few examples. Hydrochloric acid, acetic acid, nitric acid, hydrobromic acid, hydrochloric acid, chloro acid, and perchloric acid are all examples of monopolic acids because they can all donate a single H plus ion. Now let's look at the ionization of these acids in water. Let's choose the hypothetical monopolic acid. So let's choose Ha to be our acid.