A biochemist prepares two stocks of sodium phosphate buffer by titrating phosphoric acid with sodium hydroxide. She prepares a 0.10 M solution of sodium phosphate buffer at pH 2.15, and she prepares a 0.10 M solution of sodium phosphate buffer at pH 7.20. If she mixes 48 mL of the pH 2.15 buffer with 29 mL of the pH 7.20 buffer, what will be the pH of the resulting solution? Recall that the pKas of phosphoric acid are 2.15, 7.20, and 12.35. Enter your answer to the nearest hundredth.
A biochemist prepares two stocks of sodium phosphate buffer by titrating phosphoric acid with sodium hydroxide. She prepares a 0.10 M solution of sodium phosphate buffer at pH 2.15, and she prepares a 0.10 M solution of sodium phosphate buffer at pH 7.20. If she mixes 48 mL of the pH 2.15 buffer with 29 mL of the pH 7.20 buffer, what will be the pH of the resulting solution? Recall that the pKas of phosphoric acid are 2.15, 7.20, and 12.35. Enter your answer to the nearest hundredth.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter15: Acid-base Equilibria
Section: Chapter Questions
Problem 107AE: A student intends to titrate a solution of a weak monoprotic acid with a sodium hydroxide solution...
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Transcribed Image Text:A biochemist prepares two stocks of sodium phosphate buffer by
titrating phosphoric acid with sodium hydroxide. She prepares a 0.10
M solution of sodium phosphate buffer at pH 2.15, and she prepares
a 0.10 M solution of sodium phosphate buffer at pH 7.20. If she
mixes 48 mL of the pH 2.15 buffer with 29 mL of the pH 7.20 buffer,
what will be the pH of the resulting solution? Recall that the pKas of
phosphoric acid are 2.15, 7.20, and 12.35. Enter your answer to the
nearest hundredth.
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