A hydrogen compound of selenium and tellurium

A hydrogen compound of selenium and tellurium

Hydrogen selenide H2Se and hydrogen telluride H2Te are similar in nature to hydrogen sulfide but less stable. The thermal decomposition of H2Se occurs at a significant rate at 150°, whereas H2Te has occurred at 0°. The usual method for obtaining H2Se and H2Te is to decompose selenides and tellurides with water or acid:

Al2Se3 + 6H2O = 2Al (OH) 3 + 3H4Se;

FeSe + 2HCl = FeCl2 + H2Se.

Hydrogen selenide and hydrogen telluride are colorless gases with an unpleasant smell similar to hydrogen sulfide (H2Se) and hydrogen arsenide (H2Te). They dissolve in water. H2Se and H2Te are stronger acids than H2S.

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9 Rhenium characteristics	10 The discovery history of Rhenium
11 Extraction of selenium from gold bearing stone	12 Selenium is extracted from dust by sulphate and cellulose sulphate plants
13 Selenium and tellurium are extracted from anode slag for copper refining	14 Sources of selenium and tellurium
15 Applications of selenium and tellurium	16 Selenides and tellurides
17 A hydrogen compound of selenium and tellurium	18 Small molecular compound of selenium and tellurium
19 Selenate and telluride	20 Selenium acid and telluric acid