Introduction
An acid that gives two hydrogen ions for every acid molecule is known as diprotic acid. Examples of such acids are sulfuric acid (H2SO4), hydrogen sulfide (H2S), oxalic acid (H2C2O4), chromic acid (H2CrO4) and carbonic acid (H2CO3). Dissociation of a diprotic acid in water takes place in two stages. In the first stage, the diprotic acid dissociates to give one hydrogen ion and a monoprotic form of the acid. H2X(aq) H+(aq) + HX-(aq) The second stage involves the dissociation of the monoprotic form of the acid to give the second hydrogen ion and fully dissociated form of ...
