7. Q. We should be pretty comfortable dealing with monoprotic acids like: HCl HNO 3 HClO 4 CH 3COOH +HNH 3 Each of these acids has a single proton to offer to the system. Diprotic acids contain two ionizable hydrogen atoms per molecule; ionization of such acids occurs in two steps. Since they are acids, care should be taken when handling these solutions. A weak unknown monoprotic acid is titrated with a strong base. Hydrochloric acid (HCl), acetic acid (CH 3 CO 2 H or HOAc), nitric acid (HNO 3), and benzoic acid (C 6 H 5 CO 2 H) are all monoprotic acids. A diprotic acid will produce two moles of H+ (e.g. Monoprotic acids can be buffers if mixed with their salt. The 6 common monoprotic stong acids are hydrochloric, hydrobromic, hydroiodic, nitric, chloric, and perchloric acids. El nino R. 1 decade ago. Diprotic acids, such as sulfuric acid (H 2 SO 4), carbonic acid (H 2 CO 3), hydrogen sulfide (H 2 S), chromic acid (H 2 CrO 4), and oxalic acid (H 2 C 2 O 4) have two acidic hydrogen atoms. Notice that the acidic proton is attached to the bromine atom in the molecule hydrobromic acid. What is monoprotic, diprotic and triprotic acid?Ans: Monoprotic Acid: A monoprotic acid is an acid that donates only one proton or hydrogen atom per molecule to an aqueous solution. 1. H2SO4), a triprotic acid three moles of H+ (e.g. 3: Sulfuric acid contains 2 H+ that it can donate, and is therefor diprotic. A monoprotic acid will ionize and donate one mole of H+ for every one mole of acid molecules (e.g., HCl or HNO2). Even though it contains four hydrogen atoms, acetic acid, CH 3 CO 2 H, is also monoprotic because only the hydrogen atom from the carboxyl group (COOH) reacts with bases:. A monoprotic acid is that acid which will produce just one hydrogen (H+) when dissolved in water, like HCl or HNO3. 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