A buffer solution is prepared by mixing 20.6 mL of 0.747 M sodium hydrogen citrate with 96.4 mL of 0.0235 M sodium citrate. Use pKa values 1. Calculate the pH (to two decimal places) of this solution. Assume the 5% approximation is valid and that the volumes are additive. 2. Calculate the pH (to two decimal places) of the buffer solution after the addition of 76.4 mL of a 0.00103 M solution of hydrochloric acid to the existing buffer solution. Assume the 5% approximation is valid and that the volumes are additive.
A buffer solution is prepared by mixing 20.6 mL of 0.747 M sodium hydrogen citrate with 96.4 mL of 0.0235 M sodium citrate. Use pKa values 1. Calculate the pH (to two decimal places) of this solution. Assume the 5% approximation is valid and that the volumes are additive. 2. Calculate the pH (to two decimal places) of the buffer solution after the addition of 76.4 mL of a 0.00103 M solution of hydrochloric acid to the existing buffer solution. Assume the 5% approximation is valid and that the volumes are additive.
World of Chemistry, 3rd edition
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ISBN:9781133109655
Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Chapter16: Acids And Bases
Section: Chapter Questions
Problem 8STP
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
Transcribed Image Text:A buffer solution is prepared by mixing 20.6 mL of 0.747 M sodium hydrogen citrate with 96.4
mL of 0.0235 M sodium citrate. Use pKa values
1. Calculate the pH (to two decimal places) of this solution.
Assume the 5% approximation is valid and that the volumes are additive.
2. Calculate the pH (to two decimal places) of the buffer solution after the addition of 76.4 mL
of a 0.00103 M solution of hydrochloric acid to the existing buffer solution.
Assume the 5% approximation is valid and that the volumes are additive.
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