What is the pH when 100 mL of 2M NaOH is added to 100 mL of 1M acetic acid and H2O is added to make a final volume of 0.5L? (pK acetic acid= 4.76) The answer is 13.3 pH This was a practice problem from class. I was told that you can't use the Henderson–Hasselbalch equation for this problem because the NaOH is in excess. Could you explain step by step to get the answer?

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter15: Additional Aqueous Equilibria
Section: Chapter Questions
Problem 30QRT
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What is the pH when 100 mL of 2M NaOH is added to 100 mL of 1M acetic acid and H2O is added to make a final volume of 0.5L? (pK acetic acid= 4.76)

The answer is 13.3 pH

This was a practice problem from class. I was told that you can't use the Henderson–Hasselbalch equation for this problem because the NaOH is in excess. Could you explain step by step to get the answer?

 
 
 
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