Acid-Base Strengths
  Acid pKa Conjugate Base  

HCl -7 Cl -
H2SO4 -5 HSO4-
H3O + -2 H2O
H3PO4 2 H2PO4-
PhNH3+ 5 PhNH2
RCO2H 5 RCO2-
H2CO3 6 HCO3-
NH4+ 9 NH3
RCOCH2COR' 9 [RCOCHCOR'] -
HCO3- 10 CO3-2
RNH3+ 11 RNH2
RCOCH2CO2R' 11 [RCOCHCO2R'] -
RO2CCH2CO2R' 13 [RO2CCHCO2R'] -
H2O 16 HO -
RCH2OH 16 RCH2O -
R2CHOH 17 R2CHO -
R3COH 18 R3CO -
RCH2COR' 18 [RCHCOR'] -
RCH2CO2R' 22 [RCHCO2R'] -
26
NH3 36 NH2-
R2NH 40 R2N -
RH 62 R -

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