J.R. S. answered 03/25/21
Ph.D. University Professor with 10+ years Tutoring Experience
As indicated by the name, a MONOprotic acid has only 1 (mono) hydrogen to give. That would make HC2H3O2 the monoprotic acid. It may not look like it, but the only H in this acid that will be donated is the first one on the left of the formula. This is an organic acid and can be written as CH3COOH where the H on the COOH is the one (mono) that is given away.