General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN: 9781305580343
Author: Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher: Cengage Learning
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Textbook Question
Chapter 16.6, Problem 16.6CC
The beaker on the left below represents a buffer solution of a weak acid HA and its conjugate base, A−. (Water molecules and spectator ions have been omitted for clarity.)
- a Which beaker on the right, X or Y, depicts the solution after the addition of two formula units of NaOH?
- b How many HCl molecules can be added to the original buffer solution before the buffer capacity is exceeded?
- c Draw a picture of the solution where the buffer capacity has been exceeded by the addition of HCl.
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A chemistry graduate student is given 125.mL of a 0.40M ammonia NH3 solution. Ammonia is a weak base with Kb = 1.8x10−5. What mass of NH4Cl should the student dissolve in the NH3 solution to turn it into a buffer with pH = 9.03? You may assume that the volume of the solution doesn't change when then NH4Cl is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
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Chapter 16 Solutions
General Chemistry - Standalone book (MindTap Course List)
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