Q 2666723675.     Calculate the `pH` of an aqueous solution of `1.0` M ammonium formate assuming complete dissociation.
(`pK_a` of formic acid `= 3.8` and `pK _b` of ammonia `= 4.8`)

JEE 1995
A

`6.50`

B

`61.50`

C

`16.50`

D

`56.50`

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