Verified Solution • 2025–26 Session
moderate
QNEET-2021-Ch-586: NEET 2021 Chemistry - Class 11 NEET-2021-Ch-586 Solution: The \(pK_b\) of dimethyl amine and \(pK_a\) of acetic acid are…
The of dimethyl amine and of acetic acid are 3.27 and 4.77 respectively at T (K). The correct option for the pH of dimethyl ammonium acetate solution is: 6.25 8.50 5.50 7.75
Multiple Choice Options
- A 6.25
- B 8.5
- C 5.5
- D 7.75
Step-by-Step Verified Solution
Dimethylammonium acetate is a salt of weak acid and weak base whose pH can be calculated as
pH = 7 + 1 2 (pK a _ pK b )
pK a of acetic acid = 4.77
pK b
of dimethyl amine = 3.27
pH = 7 + 1 2 (4.77 _ 3.27)
= 7.75