[A-] pH = pK + Log [AH] [COO-] [NH2] pH - pK = Log or Log [COOH] [NH3+] RELATIONSHPI BETWEEN DISSOCIATION OF THE AMINO GROUP (pKb) AND pH[A-] pH = pK + Log [AH] [COO-] [NH2] pH - pK = Log or Log [COOH] [NH3+] RELATIONSHPI BETWEEN DISSOCIATION OF THE AMINO GROUP (pKb) AND pH