If the acidic group is titrating with NaOH and the basic group with HCI, the pK of the -COOH group is 9.6 and that of the -NH2 group is 2.34.

 
  • 如果酸性基团用NaOH滴定;并且碱基用COOH滴定;-COOH的pk值为9.;6;-NH2基是2
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