Codeine, C18H26O3N is the active ingredient in the sedative Paregoric™ and is a weak Brønsted base with Kb = 8.9 x 10–7 (conjugate acid is C18H26O3NH+). To a 20.00 mL sample of 0.0155 M aqueous solution of Codeine is added 9.75 mL of 0.0180 M HCl(aq). a) Calculate the pH of the above solution. b) To the above solution is added 1.00 mL of 0.0150 M NaOH(aq). Calculate the new pH that results and the % change in pH. Show your work and justify any approximations made.
Codeine, C18H26O3N is the active ingredient in the sedative Paregoric™ and is a weak Brønsted base with Kb = 8.9 x 10–7 (conjugate acid is C18H26O3NH+). To a 20.00 mL sample of 0.0155 M aqueous solution of Codeine is added 9.75 mL of 0.0180 M HCl(aq). a) Calculate the pH of the above solution. b) To the above solution is added 1.00 mL of 0.0150 M NaOH(aq). Calculate the new pH that results and the % change in pH. Show your work and justify any approximations made.
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter3: Chemical Reactions
Section: Chapter Questions
Problem 151QRT: A mountain lake that is 4.0 km × 6.0 km with an average depth of 75 m has an H+(aq) concentration of...
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Codeine, C18H26O3N is the active ingredient in the sedative Paregoric™ and is a weak Brønsted base with Kb = 8.9 x 10–7 (conjugate acid is C18H26O3NH+).
To a 20.00 mL sample of 0.0155 M aqueous solution of Codeine is added 9.75 mL of 0.0180 M HCl(aq).
- a) Calculate the pH of the above solution.
- b) To the above solution is added 1.00 mL of 0.0150 M NaOH(aq). Calculate the new pH that results and the % change in pH.
Show your work and justify any approximations made.
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