Introduction to General, Organic and Biochemistry
11th Edition
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Chapter8: Acids And Bases
Section: Chapter Questions
Problem 8.117P
Related questions
Question
![c. H20 = Lewis Base (donate
10. Calculate the pH of 0.3M solution of NH,Br if Ka of NH4* = 5.6x10-10
%3D
/PH= 11.4l](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff3da5540-e36d-4eee-a349-69c6eaa569f7%2Fab42c4ab-192c-467a-aabc-4b8b1e4dabdb%2Fs2lxlkq.jpeg&w=3840&q=75)
Transcribed Image Text:c. H20 = Lewis Base (donate
10. Calculate the pH of 0.3M solution of NH,Br if Ka of NH4* = 5.6x10-10
%3D
/PH= 11.4l
Expert Solution
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Step 1
The pH of a 0.3 M solution of NH4Br is to be calculated if Ka of NH4+ = 5.6×10-10
Step 2
In aqueous solution of NH4Br, it exists as NH4+ and Br- .
NH4+ is the conjugate acid of NH3 (a weak base), thus it will partially ionize in solution to give H3O+ and NH3.
![NH,Br(aq) → NH (aq)+Br (aq)
NH; (aq) + H,0() ENH; (aq)+Н,О "aq)](https://content.bartleby.com/qna-images/answer/f3da5540-e36d-4eee-a349-69c6eaa569f7/43d3d9b7-2082-4f88-b250-16c7e087968c/3hdr98e.png)
Step 3
Let x M be the amount of NH4+ consumed.
0.3 M of NH4Br gives 0.3 M NH4+ and 0.3 M Br-.
![Then the ICE table is:
NH,
НО
NH3
НО-
I (M)
C (M)
E (M)
0.3
0.3-x
+x
+x
0.3-x
х
х](https://content.bartleby.com/qna-images/answer/f3da5540-e36d-4eee-a349-69c6eaa569f7/43d3d9b7-2082-4f88-b250-16c7e087968c/sg91hrh.png)
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