Table of Acid and Base Strength
Ka
Acid
Name
Base
Formula
Formula
-
ClO4
Name
Large
Perchloric acid
HClO4
3.2 * 109
Hydroiodic acid
HI
I-
Iodide
1.0 * 10
9
Hydrobromic acid
HBr
Br-
Bromide
1.3 * 10
6
Hydrochloric acid
HCl
Cl-
1.0 * 10
3
2.4 * 10
1
Sulfuric acid
Nitric acid
H2SO4
Chloride
-
HSO4
-
NO3
HNO3
Perchlorate ion
Hydrogen sulfate ion
Nitrate ion
--------
Hydronium ion
H3O+
H2O
5.4 * 10-2
Oxalic acid
HO2C2O2H
HO2C2O2-
Hydrogen oxalate ion
1.3 * 10-2
Sulfurous acid
H2SO3
HSO3 -
Hydrogen sulfite ion
-
2-
1.0 * 10
-2
7.1 * 10
-3
7.2 * 10-4
6.6 * 10
-4
1.8 * 10
-4
6.3 * 10
-5
5.4 * 10-5
Hydrogen sulfate ion
HSO4
SO4
Phosphoric acid
H3PO4
H2PO4
Nitrous acid
HNO2
NO3 -
Hydrofluoric acid
HF
F-
Water
Sulfate ion
-
Dihydrogen phosphate ion
Nitrite ion
Fluoride ion
-
Methanoic acid
HCO2H
HCO2
Benzoic acid
C6H5COOH
C6H5COO-
Benzoate ion
HO2C2O2-
O2C2O2 2-
Oxalate ion
Hydrogen oxalate ion
Methanoate ion
-5
Ethanoic acid
CH3COOH
CH3COO
Ethanoate (acetate) ion
4.4 * 10-7
Carbonic acid
CO3 2-
HCO3 -
Hydrogen carbonate ion
1.1 * 10-7
Hydrosulfuric acid
H2S
1.8 * 10
6.3 * 10
-8
6.2 * 10-8
2.9 * 10
-8
6.2 * 10
-10
5.8 * 10
-10
5.8 * 10-10
4.7 * 10-11
4.2 * 10-13
1.8 * 10-13
1.3 * 10
-13
1.6 * 10-14
---------
Dihydrogen phosphate ion
Hydrogen sulfite ion
Hypochlorous acid
Hydrocyanic acid
H2PO4
HS-
HS-
HPO4
S2-
Hydrogen phosphate ion
Sulfite ion
-
HClO
ClO
HCN
-
+
Hydrogen sulfide ion
2-
Hypochlorite ion
CN
Cyanide ion
NH3
Ammonia
Ammonium ion
NH4
Boric acid
H3BO3
H2BO3 -
HCO3 -
CO3 2-
Carbonate ion
HPO4 2-
PO4 3-
Phosphate ion
H2BO3-
HBO3 2-
Hydrogen borate ion
Hydrogen carbonate ion
Hydrogen phosphate ion
Dihydrogen borate ion
2-
Dihydrogen carbonate ion
Hydrogen sulfide ion
HS-
S
Hydrogen borate ion
HBO3 2-
BO3 3-
Borate ion
H2O
OH-
Hydroxide
water
Sulfide ion