32 Consider a buffer made by adding 49.1 g of (CH3)2NH2I to 250.0 mL of 1.42 M (CH3)2NH (Kb = 5.4 x 10-4) What is the pH of this buffer? a O of 0.33 points earned > 3 attempts remaining What is the pH of the buffer after 0.300 mol of H* have been added? O of 0.33 points earned 3 attempts remaining What is the pH of the buffer after 0.120 mol of OH¯ have been added? O of 0.33 points earned 3 attempts remaining

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 33QAP: A buffer is prepared in which the ratio [ H2PO4 ]/[ HPO42 ]is 3.0. (a) What is the pH of this...
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32
Consider a buffer made by adding 49.1 g of (CH3)2NH2I to 250.0 mL of 1.42 M
(CH3)2NH (Kb = 5.4 x 10-4)
What is the pH of this buffer?
a
O of 0.33 points earned
>
3 attempts remaining
What is the pH of the buffer after 0.300 mol of H* have been added?
b
O of 0.33 points earned
3 attempts remaining
What is the pH of the buffer after 0.120 mol of OH have been added?
O of 0.33 points earned
3 attempts remaining
Transcribed Image Text:32 Consider a buffer made by adding 49.1 g of (CH3)2NH2I to 250.0 mL of 1.42 M (CH3)2NH (Kb = 5.4 x 10-4) What is the pH of this buffer? a O of 0.33 points earned > 3 attempts remaining What is the pH of the buffer after 0.300 mol of H* have been added? b O of 0.33 points earned 3 attempts remaining What is the pH of the buffer after 0.120 mol of OH have been added? O of 0.33 points earned 3 attempts remaining
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