A buffer is formed by dissolving 0.105 moles of HCIO, hypochorous acid; and 0.115 moles of NaCIO, sodium hypochlorite; in 200 ml of water. Ka = 3.0 X 10-8. a) Find the pH of the buffer. b) How does the pH compare with the pka? c) How much does the pH change when 2.00 ml of 0.50 M NaOH is added to the buffer? d) What would be the pH change if 2.00 ml of 0.50 M NaOH was added to 200 ml of pure H2O? e) How does this pH change compare to the addition of the same amount of 0.50 M NaOH to the buffer solution (as in c)?
A buffer is formed by dissolving 0.105 moles of HCIO, hypochorous acid; and 0.115 moles of NaCIO, sodium hypochlorite; in 200 ml of water. Ka = 3.0 X 10-8. a) Find the pH of the buffer. b) How does the pH compare with the pka? c) How much does the pH change when 2.00 ml of 0.50 M NaOH is added to the buffer? d) What would be the pH change if 2.00 ml of 0.50 M NaOH was added to 200 ml of pure H2O? e) How does this pH change compare to the addition of the same amount of 0.50 M NaOH to the buffer solution (as in c)?
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 31QRT
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Transcribed Image Text:A buffer is formed by dissolving 0.105 moles of HCIO, hypochorous acid; and 0.115 moles of NaCIO, sodium
hypochlorite; in 200 ml of water. Ka 3.0 X 10-8. a) Find the pH of the buffer. b) How does the pH compare
with the pka? c) How much does the pH change when 2.00 ml of 0.50 M NaOH is added to the buffer? d)
What would be the pH change if 2.00 ml of 0.50 M NaOH was added to 200 ml of pure H2O? e) How does
this pH change compare to the addition of the same amount of 0.50 M NaOH to the buffer solution (as in c)?
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