Phosphoric acid is a triprotic acid with the Ka values of 7.25 10-3, 6.31 10-8 and 3.98 10-13 respectively. Calculate the pH of a solution when a 25 mL aliquot of 0.1000 M phosphoric acid is titrated against a 0.08234 M NaOH solution. Calculate the pH when 25 ml have been added, 35 ml, 55ml, 75 ml and 100 ml have been added. Show your calculations.

Phosphoric acid is a triprotic acid with the Ka values of 7.25 10-3, 6.31 10-8 and 3.98 10-13 respectively. Calculate the pH of a solution when a 25 mL aliquot of 0.1000 M phosphoric acid is titrated against a 0.08234 M NaOH solution. Calculate the pH when 25 ml have been added, 35 ml, 55ml, 75 ml and 100 ml have been added. Show your calculations.

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter15: Acid–base Equilibria

Section: Chapter Questions

Problem 55P

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