Polyprotic Acids

There are many different types of acids. This is an introduction to polyprotic acids, with an example of the ionization steps of a polyprotic acid. What Is a Polyprotic Acid? Ka1 Ka2 Ka3 Example of a Polyprotic Acid 3 4 H3PO4(aq) ⇔ H(aq) H2PO4-(aq)Ka1 [H][H2PO4-]/[H3PO4] 7.5 x 10-3H2PO4-(aq) ⇔ H(aq) HPO42-(aq)Ka2 [H][HPO42-]/[H2PO4-] 6.2 x 10-8HPO42-(aq) ⇔ H(aq) PO43-(aq)Ka3 [H][PO43-]/[HPO42-] 4.8 x 10-13 Learn More Polyprotic Acid and Strong Base Titration Curve Titration Basics Introduction to Acids and Bases