Answered: Phosphoric acid (H3PO4) has 3…

Phosphoric acid (H3PO4) has 3 dissociable protons with the pKa values shown. Which form of phosphoric acid predominates in a solution at pH 4? Explain. Acid pKa H3PO4 2.14 H2PO4- 6.86 HPO42- 12.4

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter7: Neutralization Titrations And Graphical Representations

Section: Chapter Questions

Problem 15P

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Question

Phosphoric acid (H₃PO₄) has 3 dissociable protons with the pK_a values shown. Which form of phosphoric acid predominates in a solution at pH 4? Explain.

Acid pK_a

H₃PO₄ 2.14

H₂PO₄^- 6.86

HPO₄^2- 12.4

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