The acid-dissociation constants of phosphoric acid (H3PO4) are Kal = 7.5 x 10-3, Ka2 = 6.2 × 10-8, and Ka3 = 4.2 x 10-13 at 25°C. What is the pH of a 2.5-M aqueous solution of phosphoric acid?

General, Organic, and Biological Chemistry
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Chapter10: Acids, Bases, And Salts
Section: Chapter Questions
Problem 10.19EP: Classify each of the following acids as monoprotic, diprotic, or triprotic. a. HClO3 (chloric acid)...
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The acid-dissociation constants of phosphoric acid (H3PO4) are Ka1 = 7.5 x 10-3, Ka2 = 6.2 x 10-8, and
Ka3 = 4.2 x 10-13 at 25°C. What is the pH of a 2.5-M aqueous solution of phosphoric acid?
Transcribed Image Text:The acid-dissociation constants of phosphoric acid (H3PO4) are Ka1 = 7.5 x 10-3, Ka2 = 6.2 x 10-8, and Ka3 = 4.2 x 10-13 at 25°C. What is the pH of a 2.5-M aqueous solution of phosphoric acid?
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