Hydrogen telluride
colorless highly toxic gas
Hydrogen telluride, also known as hydrotelluric acid, tellane, or tellurium hydride, is a chemical compound. It is also an acid. Its chemical formula is H2Te. It contains hydrogen and telluride ions.
| |||
| Names | |||
|---|---|---|---|
| IUPAC name hydrogen telluride | |||
| Other names hydrotelluric acid tellane tellurium hydride | |||
| Identifiers | |||
| ECHA InfoCard | 100.029.073 | ||
PubChem CID | |||
CompTox Dashboard (EPA) | |||
| Properties | |||
| H2Te | |||
| Molar mass | 129.6158 g mol−1 | ||
| Appearance | colourless gas | ||
| Density | 3.310 g/cm3, gas 2.57 g/cm3 (-20 °C, liquid) | ||
| Melting point | −49 °C (224 K) ( [1] | ||
| Boiling point | −2.2 °C (271.8 K)(unstable above -2 °C) | ||
| 0.70 g/100 mL | |||
| Acidity (pKa) | 2.6 | ||
| Structure | |||
| bent | |||
| Thermochemistry | |||
| Std enthalpy of formation ΔfH | 0.7684 kJ/g | ||
| Hazards | |||
| Main hazards | toxic | ||
| Related compounds | |||
| Other anions | H2O H2S H2Se H2Po | ||
| Other cations | Na2Te Ag2Te | ||
| Related compounds | telluric acid tellurous acid | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
| Infobox references | |||
Properties
Hydrogen telluride is a toxic reactive gas. It easily decomposes to hydrogen and tellurium. It also burns in air to make tellurium dioxide and water. It has a very bad smell of decayed garlic. It is almost as acidic as phosphoric acid. It reacts with some metals and metal oxides to make tellurides.
Preparation
It is made by adding a strong acid to a telluride, such as sodium telluride.
Uses
Hydrogen telluride does not have many uses because it is very toxic and unstable.
Related pages
- Aluminium telluride
- Sodium tellurite
Sources
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