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Scenes A to D represent tiny portions of 0.10 M aqueous solutions of a weak acid HA (red and blue;  Ka = 5.7  ×  10−5),  its conjugate base A−(red), or a mixture of the two (only these species are shown):  (a) Which scene(s) show(s) a buffer?    Scene A    Scene B    Scene C    Scene D     (b) What is the pH of each solution? Scene A:     Scene B:     Scene C:     Scene D:      (c) Arrange the scenes (by letter) in sequence, assuming that they represent stages in a weak acid-strong base titration.    1st     2nd     3rd     4th  (d) Which scene represents the titration at its equivalence point?    Scene A    Scene B    Scene C    Scene D

Scenes A to D represent tiny portions of 0.10 M aqueous solutions of a weak acid HA (red and blue;  Ka = 5.7  ×  10−5),  its conjugate base A−(red), or a mixture of the two (only these species are shown):  (a) Which scene(s) show(s) a buffer?    Scene A    Scene B    Scene C    Scene D     (b) What is the pH of each solution? Scene A:     Scene B:     Scene C:     Scene D:      (c) Arrange the scenes (by letter) in sequence, assuming that they represent stages in a weak acid-strong base titration.    1st     2nd     3rd     4th  (d) Which scene represents the titration at its equivalence point?    Scene A    Scene B    Scene C    Scene D

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
Problem 61QAP: Each symbol in the box below represents a mole of a component in one liter of a buffer solution;...
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Scenes A to D represent tiny portions of 0.10 M aqueous solutions of a weak acid HA (red and blue; 
Ka = 5.7 
×
 10−5),
 its conjugate base A−(red), or a mixture of the two (only these species are shown):
 
(a) Which scene(s) show(s) a buffer?
  
Scene A
  
Scene B
  
Scene C
  
Scene D
 
  
(b) What is the pH of each solution?
 
Scene A: 
 

 
Scene B: 
 

 
Scene C: 
 

 
Scene D: 
 

 
(c) Arrange the scenes (by letter) in sequence, assuming that they represent stages in a weak acid-strong base titration.
 
 

1st
 
 

2nd
 
 

3rd
 
 

4th

 
(d) Which scene represents the titration at its equivalence point?
  
Scene A
  
Scene B
  
Scene C
  
Scene D
 
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