Select the monoprotic, diprotic and triprotic acids from the following: Sulphuric Acid

Question: Select the monoprotic, diprotic and triprotic acids from the following: Sulphuric Acid

Answer: Out of the following choices, the most suitable is sulphuric acid (H2SO4), a diprotic acid.

Human Element In Acid Dissociation Acids that are able to donate two hydrogen ions (protons) per molecule during the dissociation process contributing to pH changes. In the case of sulphuric acid, the dissociation occurs in two steps:In the case of sulphuric acid, the dissociation occurs in two steps:

Step 1: H2SO4 + H2O ⇌ H3O+ + HSO4−

Step 2: HSO4- + H2O ⇌ H3O+ + SO4^2-

Initially, the nucleophilic sulfur comes off the acid by donating one proton, resulting in the formation of the hydrogen sulfate ion (HSO4-). In the resulting reaction, the hydrogen sulfate ion provides another proton and thus, sulfate ion from the disulfide bond turned (SO4^2-). Thus, a sulphuric acid is said to be a diprotic acid as every single molecule can transfer two protons.