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What will be the pH of an aqueous soluti...

What will be the pH of an aqueous solution of 1.0 M ammonium formate?
Given :`pK_(a)=3.8 and pK_(b)=4.8`

Text Solution

Verified by Experts

The pH of salt `HCOONH_(4)` (a salt of weak acid + weak base) is given by:
`HCOONH_(4)+H_(2)OhArrHCOOH+NH_(4)OH`
`pH=1//2[log K_(b)-log K_(a)-log K_(w)]`
`:. pH= 1//2[pK_(a)+pK_(w)-pK_(b)]`
`pH=1//2[3.8+14-4.8]=6.5`
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