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Acid Base Strength Information

Acid
Ionization Reaction
Ki
Perchloric Acid
HClO4 <-> H+ + ClO4-
 
Hydroiodic Acid
HI <-> H+ + I-
 
Hydrobromic Acid
HBr <-> H+ + Br-
 
Hydrochloric Acid
HCl <-> H+ + Cl-
 
Nitric Acid
HNO3 <-> H+ + NO3-
 
Sulfuric Acid
H2SO4 <-> H+ + HSO4-
 
Oxalic Acid
H2C2O4 <-> H+ + HC2O4-
5.4 x 10-2
Sulfurous Acid
H2SO3 <-> H+ + HSO3-
1.7 x 10-2
Hydrogen Sulfate Ion
HSO4- <-> H+ + SO42-
1.3 x 10-2
Phosphoric Acid
H3PO4 <-> H+ + H2PO4-
7.1 x 10-3
Hydrofluoric Acid
HF <-> H+ + F-
6.7 x 10-4
Nitrous Acid
HNO2 <-> H+ + NO2-
5.1 x 10-4
Benzoic Acid
C6H5COOH <-> H+ + C6H5COO-
6.6 x 10-5
Hydrogen Oxalate Ion
HC2O4- <-> H+ + C2O42-
5.4 x 10-7
Acetic Acid
HC2H3O2 <-> H+ + C2H3O2-
1.8 x 10-5
Carbonic Acid
H2CO3 <-> H+ + HCO3-
4.4 x 10-7
Hydrogen Sulfide
H2S <-> H+ + HS-
1.0 x 10-7
Dihydrogen Phosphate Ion
H2PO4- <-> H+ + HPO42-
6.3 x 10-8
Hydrogen Sulfite Ion
HSO3- <-> H+ + SO32-
6.2 x 10-8
Hydrocyanic Acid
HCN <-> H+ + CN-
4.9 x 10-10
Ammonium Ion
NH4+ <-> H+ + NH3
5.7 x 10-10
Hydrogen Carbonate Ion
HCO3- <-> H+ + CO32-
4.7 x 10-11
Hydrogen Peroxide
H2O2 <-> H+ + HO2-
2.4 x 10-12
Monohydrogen Phosphate Ion
HPO42- <-> H+ + PO43-
4.4 x 10-13
Hydrogen Sulfide Ion
HS- <-> H+ + S2-
1.3 x 10-13
Water
H2O <-> H+ + OH-
1.0 x 10-14
Hydroxide Ion
OH- <-> H+ + O2-
1 x 10-36
Ammonia
NH3 <-> H+ + NH2-
very small
 
Base
Ionization Reaction
Ki
Ammonium Hydroxide
NH4OH <-> NH4+ + OH-
1.8 x 10-5







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