NEET2021Chemistry-Acid-Base Equilibrium
NEET 2021 Chemistry Buffer Solutions MCQ Question
Type: MCQ-numerical-Medium-Class 11
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 :
A
8.50
B
5.50
C
7.75
D
6.25
Correct Answer
Option C
Detailed Explanation
The pH of a salt of a weak acid and weak base is given by the formula: pH = 7 + 1/2(pKₐ - pKₐ). Substituting the given values, pH = 7 + 1/2(4.77 - 3.27) = 7.75.
Found an issue with this question?