Dihydroarsenite sodium

Dihydroarsenite sodium
Dihydroarsenite sodium
Are common
Systematic ; name	Dihydroarsenite sodium
Traditional names	Arsenic sodium, acidic; dihydroorthoarsenite sodium
Chem. formula	NaH 2 AsO 3
Physical properties
condition	colorless crystals
Molar mass	147.93 g / mol
Chemical properties
Solubility in water	118 0 g / 100 ml
Classification
PubChem
Smiles
Inchi
ChemSpider

Sodium dihydroarsenite is an inorganic compound, an acid salt of sodium and arsenic acid with the formula NaH ₂ AsO ₃ , colorless crystals, soluble in water.

Content

Getting

Boiling sodium meta arsenite solution :

{\mathsf {NaAsO_{2}+H_{2}O\ {\xrightarrow {100^{o}C}}\ NaH_{2}AsO_{3}}}

{\ displaystyle {\ mathsf {NaAsO_ {2} + H_ {2} O \ {\ xrightarrow {100 ^ {o} C}} \ NaH_ {2} AsO_ {3}}}}

Physical Properties

Sodium dihydroarsenite forms colorless crystals.

It is soluble in water.

Chemical Properties

It decomposes on heating producing sodium meta arsenite :

{\mathsf {NaH_{2}AsO_{3}\ {\xrightarrow {T}}\ NaAsO_{2}+H_{2}O}}

{\ displaystyle {\ mathsf {NaH_ {2} AsO_ {3} \ {\ xrightarrow {T}} \ NaAsO_ {2} + H_ {2} O}}}

Is a reducing agent:

{\mathsf {NaH_{2}AsO_{3}+I_{2}+H_{2}O\ {\xrightarrow {}}\ NaH_{2}AsO_{4}+2HI}}

{\ displaystyle {\ mathsf {NaH_ {2} AsO_ {3} + I_ {2} + H_ {2} O \ {\ xrightarrow {}} \ NaH_ {2} AsO_ {4} + 2HI}}}

Literature

Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Lidin R. A. , Andreeva L. L. , Molochko V. A. Chemical properties of inorganic substances: Textbook. manual for universities - 3rd ed., Rev. - M .: Chemistry , 2000. - 480 p. - ISBN 5-7245-1163-0
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