Sodium hydroarsenite is an inorganic compound, an acid salt of sodium and arsenic acid with the formula Na 2 HAsO 3 , colorless crystals, it dissolves in water, forms crystalline hydrates , a strong poison.
| Hydroarsenite Sodium | |
|---|---|
| Are common | |
| Systematic name | Hydroarsenite Sodium |
| Traditional names | Arsenic sodium, acidic; sodium hydoroorthoarsenite |
| Chem. formula | Na 2 HAsO 3 |
| Physical properties | |
| condition | colorless crystals |
| Molar mass | 169.91 g / mol |
| Density | 1.87 g / cm³ |
| Classification | |
| PubChem | |
| Smiles | |
| Inchi | |
Content
Getting
- Dissolution of arsenic oxide in a hot solution of sodium carbonate :
- The reaction of sodium meta arsenite with alkalis:
- Decomposition of arsenic trifluoride with alkalis:
Physical Properties
Sodium hydroarsenite forms colorless crystals.
It is soluble in water.
Forms a crystalline hydrate of the composition Na 2 HAsO 3 • 12H 2 O.
Chemical Properties
- When heated, it is easily oxidized by atmospheric oxygen (the same thing happens during long-term storage):
- Is a reducing agent:
- {\ displaystyle {\ mathsf {3Na_ {2} HAsO_ {3} + KBrO_ {3} + 6HCl \ {\ xrightarrow {}} \ 3H_ {3} AsO_ {4} + 6NaCl + KBr}}}
Application
- Pest control agent for agricultural plants.
- A preparation for the preparation of poisoned baits.
- It is used as a herbicide and in veterinary medicine .
Toxicity
Since it is an arsenic-containing substance, sodium hydroarsenite is toxic . The strongest inorganic poison.
Literature
- Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
- Lidin R.A. and other Chemical properties of inorganic substances: Textbook. manual for universities. - 3rd ed., Rev. - M .: Chemistry, 2000 .-- 480 p. - ISBN 5-7245-1163-0 .