Ch109_LectureNotes

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

Stephen E. Bialkowski's Phosphoric Acid Titration Curve

H₃PO₄ H⁺ + H₂PO₄^- 2 H⁺ + HPO₄^2- 3 H⁺ + PO₄^3-

Rxn K_a pK_a

H₃PO₄ H⁺ + H₂PO₄^- K_{a 1} = 7.5 x 10^-3 2.2

H₂PO₄^- H⁺ + HPO₄^2- K_{a 2} = 6.2 x 10^-8 7.2

HPO₄^2- H⁺ + PO₄^3- K_{a 3} = 4.8 x 10^-13 12.7

Elements Video PT Video

© R A Paselk

Last modified 3 May 2009

Rxn	K_a	pK_a
H₃PO₄ H⁺ + H₂PO₄^-	K_{a 1} = 7.5 x 10^-3	2.2
H₂PO₄^- H⁺ + HPO₄^2-	K_{a 2} = 6.2 x 10^-8	7.2
HPO₄^2- H⁺ + PO₄^3-	K_{a 3} = 4.8 x 10^-13	12.7