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Calculate the pH of an aqueous solution ...

Calculate the pH of an aqueous solution of `1.0M` ammonium formate assuming complete dissociation. `(pK_(a)` of formic acid `= 3.8 and pK_(b)` of ammonia `= 4.8`)

A

3.5

B

4.5

C

5.5

D

6.5

Text Solution

Verified by Experts

The correct Answer is:
D
Ammonium formate =salt of (WA+WB)
`pH =1/2 [pK_(W)+pK_(a)-pK_b]`
`=1/2 [14+3.8 -4.8]=6.5`
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