Polyprotic Acid Definition

Sulfuric acid is a polyprotic acid, able to donate two hydrogen ions to aqueous solution.
Sulfuric acid is a polyprotic acid, able to donate two hydrogen ions to aqueous solution. LAGUNA DESIGN / Getty Images

Polyprotic Acid Definition: A polyprotic acid is an acid that can donate more than one proton or hydrogen atom per molecule to an aqueous solution.

Examples: Sulfuric acid (H2SO4) is a polyprotic acid because it can donate two hydrogen atoms to an aqueous solution.