H: Ionization Constants of Weak Acids

Advanced General Chemistry · LibreTexts

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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 5.6 × 10−11
    cyanic HCNO 2 × 10−4 CNX_Chem_00_HH_1scyanic_img.jpg
    formic HCO2H 1.8 × 10−4 CNX_Chem_00_HH_1sformic_img.jpg
    hydrazoic HN3 2.5 × 10−5 CNX_Chem_00_HH_1shydrazoi_img.jpg
    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

    This page titled H: Ionization Constants of Weak Acids was last modified on Sun, 06 Sep 2026 15:39:33 GMT and is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by OpenStax.