The pK。 of some acids a CH3CO2H CH2(CN)CO2C2 Hs 9 CH2(COCH3 ChNO 10.3 CH3 C2H5 11 CH2(cO2C2H5)213 HOH 157 C2HsOH 159 CH2COCH 20 CH? SO,CH 23 CH3CO2C2H5 ~24 H2C-C三N 25 CHaCHNH 3511 The pKa of some acids CH3CO2H 4.7 CH2(CN)CO2C2H5 9 CH2(COCH3)2 9 CH3NO2 10.3 CH3COCH2CO2C2H5 11 CH2(CO2C2H5)2 13 HOH 15.7 C2H5OH 15.9 CH3COCH3 20 CH3SO2CH3 ~23 CH3CO2C2H5 ~24 25 CH3CH2NH2 35 H3C C N