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Chemistry LibreTexts

Ionization Constants of Weak Acids

  1. CCBYNCSA
  2. Last updated
    Jun 3, 2019
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Ionization Constants of Weak Acids
Acid Formula Ka at 25 °C Lewis Structure
acetic CH3CO2H 1.8 × 10−5 CNX_Chem_00_HH_1sacetic_img.jpg
arsenic H3AsO4 5.5 × 10−3 CNX_Chem_00_HH_1sarsenic_img.jpg
CNX_Chem_00_HH_chemform1_img.jpg 1.7 × 10−7
CNX_Chem_00_HH_chemform2_img.jpg 5.1 × 10−12
arsenous H3AsO3 5.1 × 10−10 CNX_Chem_00_HH_1sarsenous_img.jpg
boric H3BO3 5.4 × 10−10 CNX_Chem_00_HH_1sboric_img.jpg
carbonic H2CO3 4.3 × 10−7 CNX_Chem_00_HH_1scarbonic_img.jpg
CNX_Chem_00_HH_chemform3_img.jpg 4.7 × 10−11
cyanic HCNO 2 × 10−4 CNX_Chem_00_HH_1scyanic_img.jpg
formic HCO2H 1.8 × 10−4
hydrazoic HN3 2.5 × 10−5
hydrocyanic HCN 4.9 × 10−10
hydrofluoric HF 3.5 × 10−4
hydrogen peroxide H2O2 2.4 × 10−12 CNX_Chem_00_HH_1shydroper_img.jpg
hydrogen selenide H2Se 1.29 × 10−4
HSe– 1 × 10−12
hydrogen sulfate ion CNX_Chem_00_HH_chemform4_img.jpg 1.2 × 10−2 CNX_Chem_00_HH_1shydrosul_img.jpg
hydrogen sulfide H2S 8.9 × 10−8
HS– 1.0 × 10−19
hydrogen telluride H2Te 2.3 × 10−3
HTe– 1.6 × 10−11
hypobromous HBrO 2.8 × 10−9
hypochlorous HClO 2.9 × 10−8
nitrous HNO2 4.6 × 10−4 CNX_Chem_00_HH_1snitrous_img.jpg
oxalic H2C2O4 6.0 × 10−2 CNX_Chem_00_HH_1soxalic_img.jpg
CNX_Chem_00_HH_chemform5_img.jpg 6.1 × 10−5
phosphoric H3PO4 7.5 × 10−3 CNX_Chem_00_HH_1sphosphor_img.jpg
CNX_Chem_00_HH_chemform6_img.jpg 6.2 × 10−8
CNX_Chem_00_HH_chemform7_img.jpg 4.2 × 10−13
phosphorous H3PO3 5 × 10−2 CNX_Chem_00_HH_1sphospho2_img.jpg
CNX_Chem_00_HH_chemform8_img.jpg 2.0 × 10−7
sulfurous H2SO3 1.6 × 10−2 CNX_Chem_00_HH_1ssulfurou_img.jpg
CNX_Chem_00_HH_chemform9_img.jpg 6.4 × 10−8

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