Telluric acid

Structural formula
General
Surname	Telluric acid
other names	Dihydrogen trioxotellurate
Molecular formula	H 2 TeO 3
Brief description	white solid
External identifiers / databases
EC number	233-173-8
ECHA InfoCard	100.030.145
PubChem	24936
Wikidata	Q2358640
properties
Molar mass	177.61 g mol −1
Physical state	firmly
density	3.05 g cm −3
solubility	very little soluble in water
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Telluric acid is an inorganic chemical compound of tellurium .

Extraction and presentation

Telluric acid can be obtained by reacting a potassium tellurite solution with dilute nitric acid.

It is also possible to display it by reacting tellurium dichloride or tellurium tetrachloride with water.

{\ displaystyle \ mathrm {2 \ TeCl_ {2} +3 \ H_ {2} O \ longrightarrow Te + H_ {2} TeO_ {3} +4 \ HCl}}

properties

Telluric acid is a white, amorphous solid with a somewhat changing composition, the water content of which is often below the formula H ₂ TeO ₃ . It loses water when dry, but can be kept unchanged under water for several days. When heated, water is largely split off above room temperature and converted to tellurium dioxide . The compound is weakly amphoteric and reacts with bases (to tellurites ) and strong acids.

Individual evidence

↑ ^a ^b ^c ^d ^e Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 437.
^ Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, ISBN 1-4398-1462-7 , pp. 415 ( limited preview in Google Book search).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
^ Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 185 ( limited preview in Google Book search).
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 634.

[brauer-1] Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 437.

[Dale_L._Perry-2] Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, ISBN 1-4398-1462-7 , pp. 415 ( limited preview in Google Book search).

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Richard_C._Ropp-4] Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 185 ( limited preview in Google Book search).

[Arnold_F._Holleman,_Egon_Wiberg,_Nils_Wiberg-5] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 634.