Calculate the pH of aqueous solution of 1.0 M HCOONH4 assuming complete dissociation (pKa of HCOOH = 3.8 and pKb of NH3 = 4.8) –
3.5
4.5
5.5
6.5
Ammonium formate = salt of (WA + WB)
pH = [pKW + pKa – pKb]
= [14 + 3.8 – 4.8] = 6.5
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