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Consider the 50 mL 0.1 M phosphate buffer at a pH of 7.4. If 0.5 mL of 1 M HCI was added to the buffer, what is the expected pH?

Consider the 50 mL 0.1 M phosphate buffer at a pH of 7.4. If 0.5 mL of 1 M HCI was added to the buffer, what is the expected pH?

Chemistry
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
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Consider the 50 mL 0.1 M phosphate buffer at a pH of 7.4. If 0.5 mL of 1 M HCI was added to the buffer, what is the expected pH? Hint: In the Henderson-Hasselbalch equation, use the theoretical pka you calculated in Question 10 and consider the effect adding a strong acid will have on the phosphate buffer. To help with the latter, use the table below: Initial Concentration (in M) Initial Amount (in mmol) Change (in mmol) New Amount (in mmol) 2- H₂PO4HPO4 Express your answer to two places past the decimal.
Transcribed Image Text:Consider the 50 mL 0.1 M phosphate buffer at a pH of 7.4. If 0.5 mL of 1 M HCI was added to the buffer, what is the expected pH? Hint: In the Henderson-Hasselbalch equation, use the theoretical pka you calculated in Question 10 and consider the effect adding a strong acid will have on the phosphate buffer. To help with the latter, use the table below: Initial Concentration (in M) Initial Amount (in mmol) Change (in mmol) New Amount (in mmol) 2- H₂PO4HPO4 Express your answer to two places past the decimal.
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