The pKa of dimethylamine and pKa of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethylammonium acetate solution is :
The pKa of dimethylamine and pKa of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethylammonium acetate solution is :
Option 1 -
8.50
Option 2 -
5.50
Option 3 -
7.75
Option 4 -
6.25
Asked by Shiksha User
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1 Answer
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Correct Option - 3
Detailed Solution:Dimethylammonium acetate is a weak acid & weak base type of salt.
pH = 7 + ½ pK? – ½ pK?
= 7 + ½ × 4.77 – ½ × 3.27
= 7.75
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