Appendix H – Ionization Constants of Weak Acids

Appendix H

Ionization Constants Of Weak Acids

 

Acid

Formula

Ka at 25 °C

Lewis Structure

acetic

CH3CO2H

1.8 × 10−5

image

arsenic

H3AsO4

5.5 × 10−3

image

image

1.7 × 10−7

image

3.0 × 10−12

arsenous

H3AsO3

5.1 × 10−10

image

boric

H3BO3

5.4 × 10−10

image

carbonic

H2CO3

4.3 × 10−7

image

image

4.7 × 10−11

cyanic

HCNO

2 × 10−4

image

formic

HCO2H

1.8 × 10−4

image

hydrazoic

HN3

2.5 × 10−5

image

hydrocyanic

HCN

4.9 × 10−10

hydrofluoric

HF

6.4 × 10−4

hydrogen peroxide

H2O2

2.4 × 10−12

image

hydrogen selenide

H2Se

1.29 × 10−4

HSe–

1 × 10−12

hydrogen sulfate ion

image

1.2 × 10−2

image

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

image

oxalic

H2C2O4

6.0 × 10−2

image

image

6.1 × 10−5

phosphoric

H3PO4

7.5 × 10−3

image

image

6.2 × 10−8

image

4.2 × 10−13

phosphorous

H3PO3

5 × 10−2

image

image

2.0 × 10−7

sulfurous

H2SO3

1.6 × 10−2

image

image

6.4 × 10−8

Table H1

Ionization Constants of Weak Acids

License

Icon for the Creative Commons Attribution 4.0 International License

Chemistry 112 (Chapters 12-17 of OpenStax General Chemistry) Copyright © 2019 by Rice University is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

Share This Book