Acid

Ionization Equation

K_a

Acetic

CH₃CO₂H + H₂O ⇄ H₃O⁺ + CH₃CO₂^-

 1.8 x 10^-5

Arsenic

 H₃AsO₄ + H₂O ⇄ H₃O⁺ + H₂AsO₄^-

 K_a1 = 2.5 x 10^-4

 H₂AsO₄^- + H₂O ⇄ H₃O⁺ + HAsO₄^2-

 K_a2 = 5.6 x 10^-8

 HAsO₄^2- + H₂O ⇄ H₃O⁺ + AsO₄^3-

 K_a3 = 3.0 x 10^-13

Arsenous

 H₃AsO₃ + H₂O ⇄ H₃O⁺ + H₂AsO₃^-

 K_a1 = 6.0 x 10^-10

 H₂AsO₃^- + H₂O ⇄ H₃O⁺ + HAsO₃^2-

 K_a2 = 3.0 x 10^-14

Benzoic

 C₆H₅CO₂H + H₂O ⇄ H₃O⁺ + C₆H₅CO₂-

 6.3 x 10^-5

Boric

 B(OH)₃ + H₂O ⇄ H₃O⁺ + BO(OH)₂^-

 K_a1 = 7.3 x 10^-10

 BO(OH)₂^- + H₂O ⇄ H₃O⁺ + BO₂(OH)^2-

 K_a2 = 1.8 x 10^-13

 BO₂₍OH)2^- + H₂O ⇄ H₃O⁺ + BO₃^3-

 K_a3 = 1.6 x 10^-14

Butanoic

C₃H₇CO₂H + H₂O ⇄ H₃O⁺ + C₃H₇CO₂^-

1.5 x 10^-5

Carbonic

 H₂CO₃ + H₂O ⇄ H₃O⁺ + HCO₃^-

 K_a1 = 4.2 x 10^-7

 HCO₃^- + H₂O ⇄ H₃O⁺ + CO₃^2-

 K_a2 = 4.8 x 10^-11

Chloroacetic

ClCH₂CO₂H + H₂O ⇄ H₃O⁺ + ClCH₂CO₂^-

1.4 x 10^-3

Chlorous

HClO₂ + H₂O ⇄ H₃O⁺ + ClO₂^-

1.1 x 10^-2

Citric

 C₃H₅O(CO₂H)₃ + H₂O ⇄ H₃O⁺ + C₄H₅O₃(CO₂H)₂^-

 K_a1 = 7.4 x 10^-3

 C₄H₅O₃(CO₂H)₂^- + H₂O ⇄ H₃O⁺ + C₅H₅O₅(CO₂H)^2-

 K_a2 = 1.7 x 10^-5

 C₅H₅O₅(CO₂H)^2- + H₂O ⇄ H₃O⁺ + C₆H₅O₇^3-

 K_a3 = 7.4 x 10^-7

Cyanic

HOCN + H₂O ⇄ H₃O⁺ + OCN^-

3.5 x 10^-4

Formic

 HCO₂H + H₂O ⇄ H₃O⁺ + HCO₂^-

 1.8 x 10^-4

Hydrazoic

 HN₃ + H₂O ⇄ H₃O⁺ + N₃^-

 1.9 x 10^-5

Hydrocyanic

 HCN + H₂O ⇄ H₃O⁺ + CN^-

 4.0 x 10^-10

Hydrofluoric

 HF + H₂O ⇄ H₃O⁺ + F^-

 7.2 x 10^-4

Hydrogen chromate

HCrO₄^- + H₂O ⇄ H₃O⁺ + CrO₄^2-

3.0 x 10^-7

Hydrogen peroxide

 H₂O₂ + H₂O ⇄ H₃O⁺ + HO₂^-

 2.4 x 10^-12

 Hydrogen selenate

 HSeO₄^- + H₂O ⇄ H₃O⁺ + SeO₄^2-

 1.2 x 10^-2

Hydrosulfuric

 H₂S + H₂O ⇄ H₃O⁺ + HS^-

 K_a1 = 1.0 x 10^-7

 HS^- + H₂O ⇄ H₃O⁺ + S^2-

 K_a2 = 1.0 x 10^-19

Hypobromous

 HBrO + H₂O ⇄ H₃O⁺ + BrO^-

 2.5 x 10^-9

Hypochlorous

 HClO + H₂O ⇄ H₃O⁺ + ClO^-

 3.5 x 10^-8

Hypoiodous

 HIO + H₂O ⇄ H₃O⁺ + IO^-

 2.3 x 10^-11

iodic

HIO₃ + H₂O ⇄ H₃O⁺ + IO₃^-

1.7 x 10^-1

Nitrous

 HNO₂ + H₂O ⇄ H₃O⁺ + NO₂^-

 4.5 x 10^-4

Oxalic

 H₂C₂O₄ + H₂O ⇄ H₃O⁺ + HC₂O₄^-

 K_a1 = 5.9 x 10^-2

 HC₂O₄^- + H₂O ⇄ H₃O⁺ + C₂O₄^2-

 K_a2 = 6.4 x 10^-5

Phenol

 C₆H₅OH + H₂O ⇄ H₃O⁺ + C₆H₅O^-

 1.3 x 10^-10

Phosphoric

 H₃PO₄ + H₂O ⇄ H₃O⁺ + H₂PO₄^-

 K_a1 = 7.5 x 10^-3

 H₂PO₄^- + H₂O ⇄ H₃O⁺ + HPO₄^2-

 K_a2 = 6.2 x 10^-8

 HPO₄^2- + H₂O ⇄ H₃O⁺ + PO₄^3-

 K_a3 = 3.6 x 10^-13

Phosphorous

 H₃PO₃ + H₂O ⇄ H₃O⁺ + H₂PO₃^-

 K_a1 = 1.6 x 10^-2

 H₂PO₃^- + H₂O ⇄ H₃O⁺ + HPO₃^2-

 K_a2 = 7.0 x 10^-7

Propanoic

C₂H₅CO₂H + H₂O ⇄ H₃O⁺ + C₂H₅CO₂^-

1.3 x 10^-5

Selenous

 H₂SeO₃ + H₂O ⇄ H₃O⁺ + HSeO₃^-

 K_a1 = 2.7 x 10^-3

 HSeO₃^- + H₂O ⇄ H₃O⁺ + SeO₃^2-

 K_a2 = 2.5 x 10^-7

Hydrogen sulfate

 HSO₄^- + H₂O ⇄ H₃O⁺ + SO₄^2-

 1.2 x 10^-2

Sulfurous

 H₂SO₃ + H₂O ⇄ H₃O⁺ + HSO₃^-

 K_a1 = 1.2 x 10^-2

 H_SO₃^- + H₂O ⇄ H₃O⁺ + SO₃^2-

 K_a2 = 6.2 x 10^-8

Tellurous

 H₂TeO₃ + H₂O ⇄ H₃O⁺ + HTeO₃^-

 K_a1 = 2 x 10^-3

 HTeO₃^- + H₂O ⇄ H₃O⁺ + TeO₃^2-

 K_a2 = 1 x 10^-8