DISSOCIATION OF THE AMINO GROUP (pKb) R C COO￾NH2 H H + H NH3 + R C COO- + H + K2 = H NH2 R C COO￾R C COO￾NH3 + H H + = K2 H NH2 R C COO￾R C COO￾NH3 + H pH = pK2 Log H NH2 R C COO￾R C COO￾NH3 + H [ ] [ ] +DISSOCIATION OF THE AMINO GROUP (pKb) R C COO￾NH2 H H + H NH3 + R C COO- + H + K2 = H NH2 R C COO￾R C COO￾NH3 + H H + = K2 H NH2 R C COO￾R C COO￾NH3 + H pH = pK2 Log H NH2 R C COO￾R C COO￾NH3 + H [ ] [ ] +