A student performs a titration of 35.0 mL of a phosphoric acid (H,PO,) solution of unknown concentration with a standardized 1.25 M NaOH solution. The titration requires 26.2 mL of base to reach the third equivalence point. What is the concentration of the H,PO, solution?

A student performs a titration of 35.0 mL of a phosphoric acid (H,PO,) solution of unknown concentration with a standardized 1.25 M NaOH solution. The titration requires 26.2 mL of base to reach the third equivalence point. What is the concentration of the H,PO, solution?

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter14: Acid- Base Equilibria

Section: Chapter Questions

Problem 97AE: A student intends to titrate a solution of a weak monoprotic acid with a sodium hydroxide solution...

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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

A student performs a titration of 35.0 mL of a phosphoric
acid (H¸PO,) solution of unknown concentration with a
standardized 1.25 M NaOH solution. The titration requires
26.2 mL of base to reach the third equivalence point. What
is the concentration of the H,PO,
solution?

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