The compound whose 0.1 M solution is acidic [pKa of HCOOH = 3.75, pKb of NH4OH = 4.74] pKb of NH4OH = 4.74] The compound whose 0.1 M solution is acidic [pKa of HCOOH = 3.75 November 18, 2020 Category: Chapter 6 - Ionic Equilibrium (Level 1 and Level 2) , Chapter 7 - Equilibrium [...]