colorless highly toxic gas From Wikipedia, the free encyclopedia
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.
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Names | |||
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IUPAC name
hydrogen telluride | |||
Other names
hydrotelluric acid tellane tellurium hydride | |||
Identifiers | |||
ECHA InfoCard | 100.029.073 | ||
PubChem CID |
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CompTox Dashboard (EPA) |
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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 | {{{value}}} | ||
Other cations | {{{value}}} | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
Infobox references | |||
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.
It is made by adding a strong acid to a telluride, such as sodium telluride.
Hydrogen telluride does not have many uses because it is very toxic and unstable.
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