21.8: Ionization Constants of Weak Acids
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| Ionization Constants of Weak Acids | |||
|---|---|---|---|
| Acid | Formula | K a at 25 °C | Lewis Structure |
| acetic | CH 3 CO 2 H | 1.8 × 10 −5 | |
| arsenic | H 3 AsO 4 | 5.5 × 10 −3 | |
| 1.7 × 10 −7 | |||
| 5.1 × 10 −12 | |||
| arsenous | H 3 AsO 3 | 5.1 × 10 −10 | |
| boric | H 3 BO 3 | 5.4 × 10 −10 | |
| carbonic | H 2 CO 3 | 4.3 × 10 −7 | |
| 5.6 × 10 −11 | |||
| cyanic | H CNO | 2 × 10 −4 | |
| formic | HCO 2 H | 1.8 × 10 −4 | |
| hydrazoic | H N 3 | 2.5 × 10 −5 | |
| hydrocyanic | H CN | 4.9 × 10 −10 | |
| hydrofluoric | H F | 3.5 × 10 −4 | |
| hydrogen peroxide | H 2 O 2 | 2.4 × 10 −12 | |
| hydrogen selenide | H 2 Se | 1.29 × 10 −4 | |
| H Se – | 1 × 10 −12 | ||
| hydrogen sulfate ion | 1.2 × 10 −2 | ||
| hydrogen sulfide | H 2 S | 8.9 × 10 −8 | |
| H S – | 1.0 × 10 −19 | ||
| hydrogen telluride | H 2 Te | 2.3 × 10 −3 | |
| H Te – | 1.6 × 10 −11 | ||
| hypobromous | H BrO | 2.8 × 10 −9 | |
| hypochlorous | H ClO | 2.9 × 10 −8 | |
| nitrous | H NO 2 | 4.6 × 10 −4 | |
| oxalic | H 2 C 2 O 4 | 6.0 × 10 −2 | |
| 6.1 × 10 −5 | |||
| phosphoric | H 3 PO 4 | 7.5 × 10 −3 | |
| 6.2 × 10 −8 | |||
| 4.2 × 10 −13 | |||
| phosphorous | H 3 PO 3 | 5 × 10 −2 | |
| 2.0 × 10 −7 | |||
| sulfurous | H 2 SO 3 | 1.6 × 10 −2 | |
| 6.4 × 10 −8 |