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pK(a) of NH(4)^(+) is 9.26. Hence, effec...

`pK_(a)` of `NH_(4)^(+)` is 9.26. Hence, effective range for `NH_(4)OH-NH_(4)Cl` buffer is about pH:

A

8.26 to 10.26

B

4.74 to 5.74

C

3.74 to 5.74

D

8.26 to 9.26

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