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15 Nov 2021
Problem 101
Page 690
Section: Cumulative Problems
Chapter 16: Aqueous Ionic Equilibrium
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15 Nov 2021
Given information
Dimethylamine and dimethyl ammonium chloride are the buffer's components.
The pH of the buffer is 
.
Step-by-step explanation
Step 1.
A buffer solution is made up of a certain amount of weak acid and its conjugate base, or a certain amount of weak acid and its conjugate base.
When you add a buffer solution to an acid, the conjugate base in the buffer neutralizes it, and when you add a buffer solution to a base, the weak acid neutralizes it.
The value of 
is 
.
The 
of dimethylamine is given by the formula:
Substitute the given value to the above expression:
The Henderson Hasselbalch equation is given by the formula:
Substitute the calculated value to the above expression:
The buffer must be prepared by 
of dimethylamine and 
of dimethyl ammonium chloride.
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Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944