Answered: Calculate the pH when 8.00 mL of .1250M…

Calculate the pH when 8.00 mL of .1250M trisodium phosphate is mixed with 10.50mL of .0920M phosphoric acid. For H3PO4 : pKa1 is 2.15, pKa2 is 7.20, pKa3 is 12.30

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter15: Complex Acid/base Systems

Section: Chapter Questions

Problem 15.13QAP

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

Calculate the pH when 8.00 mL of .1250M trisodium phosphate is mixed with 10.50mL of .0920M phosphoric acid.

For H₃PO₄ : pKa₁ is 2.15, pKa₂ is 7.20, pKa₃ is 12.30

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