Stephen E. Bialkowski's relative fractions of phosphoric acid species with pH

 

 

Stephen E. Bialkowski's Phosphoric Acid Titration Curve

 

 

 

 

H3PO4 Equilibrium double arrow H+ + H2PO4- Equilibrium double arrow 2 H+ + HPO42- Equilibrium double arrow 3 H+ + PO43-

Rxn   Ka  pKa
 H3PO4 Equilibrium double arrow H+ + H2PO4-  Ka 1 = 7.5 x 10-3  2.2
 H2PO4- Equilibrium double arrow H+ + HPO42-  Ka 2  = 6.2 x 10-8  7.2
HPO42- Equilibrium double arrow H+ + PO43-  Ka 3  = 4.8 x 10-13  12.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Elements Video PT Video


© R A Paselk

Last modified 3 May 2009