What volumes of 0.200 MHCOOH and 2.00 MNaOHwould make 500. mL of a buffer with the pH of one made from475 mL of 0.200 Mbenzoic acid and 25 mL of 2.00 MNaOH?
What volumes of 0.200 MHCOOH and 2.00 MNaOHwould make 500. mL of a buffer with the pH of one made from475 mL of 0.200 Mbenzoic acid and 25 mL of 2.00 MNaOH?
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter16: Reactions Between Acids And Bases
Section: Chapter Questions
Problem 16.41QE
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Question
What volumes of 0.200 MHCOOH and 2.00 MNaOHwould make 500. mL of a buffer with the pH of one made from475 mL of 0.200 Mbenzoic acid and 25 mL of 2.00 MNaOH?
Expert Solution
Step 1
This problem is solved by using Henderson equating for calculation of pH of buffer.
Step 2
Using Henderson's equation:
Now , we hav to calculate number of moles of benzoic acid:
= molarity* volume
Step 3
Also, number of moles of NaOH:
NaOH | |||
0.095 | 0.05 | 0 | 0 |
0.095-0.05 | 0 | 0.05 |
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