Tellurous acid
Tellurous acid is a chemical compound. It is also an acid. Its chemical formula is H2TeO3. It contains hydrogen and tellurite ions. It can be made by reacting tellurium dioxide with water. It is not made as easily as telluric acid.
| Names | |
|---|---|
| IUPAC name
Tellurous acid | |
| Other names
Tellurium dioxide hydrate, tellurium(IV) oxide hydrate | |
| Identifiers | |
3D model (JSmol) |
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| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.030.145 |
PubChem CID |
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CompTox Dashboard (EPA) |
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SMILES
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| Properties | |
| H2TeO3 | |
| Molar mass | 177.616 grams |
| Appearance | colorless crystals |
| Density | ~ 3 g/cm3 |
| Boiling point | decomp. |
| negligible | |
| Acidity (pKa) | pKa(1) = 2.48, pKa(2) = 7.70 |
| Structure | |
| unknown | |
| pyramidal at Te | |
| Related compounds | |
| Other anions | Selenous acid Sulfurous acid |
| Other cations | Sodium tellurite |
| Related compounds | Telluric acid Selenic acid Sulfuric acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
It is a weak oxidizing agent and a weak reducing agent. It easily turns back into tellurium dioxide and water. It is a weak acid. It reacts with bases to make tellurites.
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