Sodium tellurite

Crystal structure
	__ Na + __ Te 4+ __ O 2−
General
Surname	Sodium tellurite
other names	Sodium tellurate (IV)
Ratio formula	Na 2 TeO 3
Brief description	white solid
External identifiers / databases
EC number	233-268-4
ECHA InfoCard	100.030.231
PubChem	24935
Wikidata	Q2364532
properties
Molar mass	221.58 g mol −1
Physical state	firmly
solubility	soluble in water
safety instructions
GHS labeling of hazardous substances danger
H and P phrases	H: 300
	P: 264-270-301 + 310-321-405-501
Toxicological data	54 mg kg −1 ( LD 50 , rabbit , oral )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sodium tellurite is an inorganic chemical compound of sodium from the group of tellurites .

Extraction and presentation

Sodium tellurite can be obtained by reacting tellurium dioxide with sodium carbonate under a protective atmosphere such as carbon dioxide .

{\ displaystyle \ mathrm {TeO_ {2} + Na_ {2} CO_ {3} \ longrightarrow Na_ {2} TeO_ {3} + CO_ {2}}}

It is also obtained from copper telluride or silver telluride , which are produced in the electrolytic extraction of copper from ores. It is used as an intermediate product in the manufacture of tellurium.

{\ displaystyle \ mathrm {Cu_ {2} Te + Na_ {2} CO_ {3} +2 \ O_ {2} \ longrightarrow Na_ {2} TeO_ {3} +2 \ CuO + CO_ {2}}}

properties

Sodium tellurite is a white solid that is soluble in water. The solution is decomposed by carbon dioxide from the air with the separation of tellurium dioxide. Sodium tellurite goes to the air in the heating Natriumtellurat over.

use

By reaction of a solution of calcium chloride with sodium tellurite can Calciumtellurit be won.

{\ displaystyle {\ ce {CaCl2 + Na2TeO3 -> CaTeO3 * H2O + 2NaCl}}}

literature

SL Tagg, JC Huffman, JW Zwanziger: Crystal Structure and Sodium Environments in Sodium Tetratellurite, Na2Te4O9, and Sodium Tellurite, Na2TeO3, by X-ray Crystallography and Sodium-23 NMR. In: Chemistry of Materials. 6, 1994, pp. 1884-1889, doi : 10.1021 / cm00046a052

Individual evidence

↑ ^a ^b ^c ^d ^e ^f data sheet Sodium tellurite (IV), 99.5% (metals basis) from AlfaAesar, accessed on December 21, 2013 ( PDF )(JavaScript required) .
^ S. Gangolli, Royal Society of Chemistry (Great Britain): The Dictionary of Substances and Their Effects: OS . Royal Society of Chemistry, 1999, ISBN 0-85404-833-2 , pp. 847 ( limited preview in Google Book search).
↑ ^a ^b 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.
^ George K. Schweitzer Distinguished Professor of Chemistry University of Tennessee, Lester L. Pesterfield Professor of Chemistry Western Kentucky University: The Aqueous Chemistry of the Elements . Oxford University Press, 2009, ISBN 0-19-974219-7 , pp. 238 ( limited preview in Google Book search).
^ Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 106 ( limited preview in Google Book search).

[Alfa-1] ↑ ^a ^b ^c ^d ^e ^f data sheet Sodium tellurite (IV), 99.5% (metals basis) from AlfaAesar, accessed on December 21, 2013 ( PDF )(JavaScript required) .

[S._Gangolli,_Royal_Society_of_Chemistry_(Great_Britain)-2] S. Gangolli, Royal Society of Chemistry (Great Britain): The Dictionary of Substances and Their Effects: OS . Royal Society of Chemistry, 1999, ISBN 0-85404-833-2 , pp. 847 ( limited preview in Google Book search).

[brauer-3] 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.

[George_K._Schweitzer_Distinguished_Professor_of_Chemistry_University_of_Tennessee,_Lester_L._Pesterfield_Professor_of_Chemistry_Western_Kentucky_University-4] George K. Schweitzer Distinguished Professor of Chemistry University of Tennessee, Lester L. Pesterfield Professor of Chemistry Western Kentucky University: The Aqueous Chemistry of the Elements . Oxford University Press, 2009, ISBN 0-19-974219-7 , pp. 238 ( limited preview in Google Book search).

[Richard_C._Ropp-5] Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 106 ( limited preview in Google Book search).