Verified Solution • 2025–26 Session
moderate
QAIPM-2002-Ch-2802: NEET 2002 Chemistry - Class 11 AIPM-2002-Ch-2802 Solution: Solution of 0.1 N \(NH_4OH\) and 0.1 N \(NH_4Cl\) has pH 9.25.…
Solution of 0.1 N and 0.1 N has pH 9.25. Then find out of
Multiple Choice Options
- A 9.25
- B 4.75
- C 3.75
- D 8.25
Step-by-Step Verified Solution
NH 4 OH and NH 4 Cl constitute to form a basic
buffer.
pOH = pK b + log [ S a l t ] [ B a s e ]
We know, pOH+ pH = 14 or pOH = 14 � pH
_ 14 - pH - log _ [ S a l t ] [ B a s e ] = pK b
_ 14 - 9.25 - log _ 0.1 0.1 = pK b
_ 14 � 9.25 � 0 = pK b
_ pK b = 4.75