A sodium hydrogen carbonate/sodium carbonate buffer system is to be prepared with a pH of 9.89. The relevant pKa value is 10.33. What volume of 0.178 M NaHCO3 must be added to 750 mL of a 0.132 M Na2CO3 solution to obtain this pH?

A sodium hydrogen carbonate/sodium carbonate buffer system is to be prepared with a pH of 9.89. The relevant pKa value is 10.33. What volume of 0.178 M NaHCO3 must be added to 750 mL of a 0.132 M Na2CO3 solution to obtain this pH?

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter14: Equilibria In Acid-base Solutions

Section: Chapter Questions

Problem 12QAP: A buffer is prepared by dissolving 0.062 mol of sodium fluoride in 127 mL of 0.0399 M hydrofluoric...

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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 sodium hydrogen carbonate/sodium carbonate buffer system is to be prepared with a pH of 9.89. The relevant pK_a value is 10.33. What volume of 0.178 M NaHCO₃ must be added to 750 mL of a 0.132 M Na₂CO₃ solution to obtain this pH?

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