Barium metaarsenate

Barium metaarsenate
Barium metaarsenate
General
Systematic ; name	Barium metaarsenate
Traditional names	Arsenic Barium (meta)
Chem. formula	Ba (AsO 3 ) 2
Physical properties
condition	White powder
Molar mass	383.18 g / mol
Density	5.0 g / cm³
Thermal properties
T. melt.	958 ° C
T. decomp.	500; 958 ° C
Enthalpy of Education	1857.9; 1748.1 kJ / mol

Barium metaarsenate is an inorganic compound, a salt of barium and arsenic acid with the formula Ba (AsO ₃ ) ₂ , colorless crystals.

Content

1 Receiving
2 Physical properties
3 Chemical properties
4 notes
5 Literature

Getting

Barium dihydroarsenate heating ^[2] :

{\mathsf {Ba(H_{2}AsO_{4})_{2}\ {\xrightarrow {230^{o}C}}\ Ba(AsO_{3})_{2}+H_{2}O}}

{\ displaystyle {\ mathsf {Ba (H_ {2} AsO_ {4}) _ {2} \ {\ xrightarrow {230 ^ {o} C}} \ Ba (AsO_ {3}) _ {2} + H_ { 2} O}}}

Physical Properties

Barium metaarsenate forms monoclinic syngony crystals, space group C 2 / c , cell parameters a = 0.73204 nm , b = 1.77536 nm , c = 0.49737 nm , β = 128.690 ° , Z = 4 ^[3] .

Chemical Properties

The compound polymerizes, forming "glasses" [Ba (AsO ₃ ) ₂ ] _n .
Reacts with water:

{\mathsf {3Ba(AsO_{3})_{2}+6H_{2}O\ {\xrightarrow {}}\ Ba_{3}(AsO_{4})_{2}+4H_{3}AsO_{4}}}

{\ displaystyle {\ mathsf {3Ba (AsO_ {3}) _ {2} + 6H_ {2} O \ {\ xrightarrow {}} \ Ba_ {3} (AsO_ {4}) _ {2} + 4H_ {3 } AsO_ {4}}}}

Notes

↑ Mustafin E. S. Experimental and calculated values of the standard enthalpy of formation of arsenates of alkali and alkaline earth metals // Bulletin of the Tomsk Polytechnic University. - 2010. - T. 317 , No. 3 . - S. 95-98 .
↑ Richard C. Ropp ,. Encyclopedia of the Alkaline Earth Compounds. - Elsevier, 2013 .-- 1187 p. - ISBN 978-0-444-59550-8 .
↑ Matthias Weil. Insights into Formation Conditions, Crystal Structures, and Thermal Behavior of Hydrous and Anhydrous Barium Arsenates // Crystal Growth and Design. - 2016. - T. 16 , No. 2 . - S. 908–921 . - DOI : 10.1021 / acs.cgd.5b01458 .

Literature

Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Lidin R.A. and other constants of inorganic substances. - M .: Bustard, 2006 .-- 685 p. - ISBN 5-7107-8085-5 .

[1] Mustafin E. S. Experimental and calculated values of the standard enthalpy of formation of arsenates of alkali and alkaline earth metals // Bulletin of the Tomsk Polytechnic University. - 2010. - T. 317 , No. 3 . - S. 95-98 .

[Ropp-2] Richard C. Ropp ,. Encyclopedia of the Alkaline Earth Compounds. - Elsevier, 2013 .-- 1187 p. - ISBN 978-0-444-59550-8 .

[3] Matthias Weil. Insights into Formation Conditions, Crystal Structures, and Thermal Behavior of Hydrous and Anhydrous Barium Arsenates // Crystal Growth and Design. - 2016. - T. 16 , No. 2 . - S. 908–921 . - DOI : 10.1021 / acs.cgd.5b01458 .

Barium metaarsenate
General
Systematic name	Barium metaarsenate
Traditional names	Arsenic Barium (meta)
Chem. formula	Ba (AsO ₃ ) ₂
Physical properties
condition	White powder
Molar mass	383.18 g / mol
Density	5.0 g / cm³
Thermal properties
T. melt.	958 ° C
T. decomp.	500; 958 ° C
Enthalpy of Education	1857.9; 1748.1 ^[1] kJ / mol