James Richard Fromm
| Common Name | Formula | Constant | pKa |
| Arsenic Acid | H3AsO4 | K1 = 5.65 x 10-3 | 2.248 |
| --- | H2AsO4- | K2 = 1.75 x 10-7 | 6.757 |
| --- | HAsO42- | K3 = 2.54 x 10-12 | 11.596 |
| Boric Acid | H3BO3 | K1 = 5.78 x 10-10 | 9.238 |
| Carbonic Acid | H2CO3 | K1 = 4.35 x 10-7 | 6.361 |
| --- | HCO3- | K2 = 4.69 x 10-11 | 10.329 |
| Chromic Acid | H2CrO4 | K1 = 3.55 | -0.550 |
| --- | HCrO4- | K2 = 3.36 x 10-7 | 6.473 |
| Citric Acid | HOC(CH2COOH)3 | K1 = 7.42 x 10-4 | 3.130 |
| --- | --- | K2 = 1.75 x 10-5 | 4.757 |
| --- | --- | K3 = 3.99 x 10-6 | 5.602 |
| EDTA | C2H4N2(CH2COOH)4 | K1 = 9.81 x 10-3 | 2.008 |
| --- | --- | K2 = 2.08 x 10-3 | 2.683 |
| --- | --- | K3 = 7.98 x 10-7 | 6.098 |
| --- | --- | K4 = 6.60 x 10-11 | 10.181 |
| Glycinium Ion | H3NCH2COOH+ | K1 = 4.47 x 10-3 | 2.350 |
| - (Glycine) | H2NCH2COOH | K2 = 1.67 x 10-10 | 9.778 |
| Hydrogen Sulfide | H2S | K1 = 1.02 x 10-7 | 6.992 |
| --- | HS- | K2 = 1.22 x 10-13 | 12.915 |
| Oxalic Acid | HOOCCOOH | K1 = 5.40 x 10-2 | 1.268 |
| --- | HOOCCOO- | K2 = 5.23 x 10-5 | 4.282 |
| Phthalic Acid | C6H4(COOH)2 | K1 = 1.13 x 10-3 | 2.946 |
| --- | --- | K2 = 3.90 x 10-6 | 5.409 |
| Phosphoric Acid | H3PO4 | K1 = 7.11 x 10-3 | 2.148 |
| --- | H2PO4- | K2 = 6.23 x 10-8 | 7.206 |
| --- | HPO4-- | K3 = 4.55 x 10-13 | 12.342 |
| Succinic Acid | C(CH2)2COOH | K1 = 6.21 x 10-5 | 4.207 |
| --- | HOOC(CH2)2COO- | K2 = 2.31 x 10-6 | 5.636 |
| Sulfuric Acid | H2SO4 | K1 > 1 | Negative |
| --- | HSO4- | K2 = 1.01 x 10-2 | 1.994 |
| Sulfurous Acid | H2SO3 | K1 = 1.71 x 10-2 | 1.766 |
| --- | HSO3- | K2 = 5.98 x 10-8 | 7.223 |