Chemistry » Acid-Base Equilibria » Ionization Constants of Weak Acids

Appendix: Ionization Constants of Weak Acids

Appendix: Ionization Constants of Weak Acids

Ionization Constants of Weak Acids
AcidFormulaKa at 25 °CLewis Structure
aceticCH3CO2H1.8 \(×\) 10−5
arsenicH3AsO45.5 \(×\) 10−3
 1.7 \(×\) 10−7
 5.1 \(×\) 10−12
arsenousH3AsO35.1 \(×\) 10−10
boricH3BO35.4 \(×\) 10−10
carbonicH2CO34.3 \(×\) 10−7
 4.7 \(×\) 10−11
cyanicHCNO2 \(×\) 10−4
formicHCO2H1.8 \(×\) 10−4
hydrazoicHN32.5 \(×\) 10−5
hydrocyanicHCN4.9 \(×\) 10−10 
hydrofluoricHF3.5 \(×\) 10−4 
hydrogen peroxideH2O22.4 \(×\) 10−12
hydrogen selenideH2Se1.29 \(×\) 10−4 
HSe1 \(×\) 10−12 
hydrogen sulfate ion 1.2 \(×\) 10−2
hydrogen sulfideH2S8.9 \(×\) 10−8 
HS1.0 \(×\) 10−19 
hydrogen tellurideH2Te2.3 \(×\) 10−3 
HTe1.6 \(×\) 10−11 
hypobromousHBrO2.8 \(×\) 10−9 
hypochlorousHClO2.9 \(×\) 10−8 
nitrousHNO24.6 \(×\) 10−4
oxalicH2C2O46.0 \(×\) 10−2
 6.1 \(×\) 10−5
phosphoricH3PO47.5 \(×\) 10−3
 6.2 \(×\) 10−8
 4.2 \(×\) 10−13
phosphorousH3PO35 \(×\) 10−2
 2.0 \(×\) 10−7
sulfurousH2SO31.6 \(×\) 10−2
 6.4 \(×\) 10−8

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