Barium Arsenites
Barium Arsenites Basic information
- Product Name:
- Barium Arsenites
- Synonyms:
-
- Barium Arsenites
- MW:
- 0
- Mol File:
- Mol File
Barium Arsenites Usage And Synthesis
Description
Tribasic barium arsenite, Ba3(AsO3)2, has been
prepared by the addition of potassium orthoarsenite to
an aqueous solution of barium chloride and drying the
precipitate at 100 C in a current of hydrogen gas. The
pH needs to at least 13.5. It is obtained as a white amorphous
powder, readily soluble in hot water and in dilute acids. When heated rapidly to about 730 °C in an inert
atmosphere, it decomposed into arsenic and the arsenate.
This is a double oxidation–reduction reaction in which
part of the tribasic arsenite is oxidized and part reduced:
4Ba3（AsO3）2 + heat ? 12BaO + 4As2O3 + 4As
4As2O302As2O5 + 4As + 2O2
4Ba3（AsO3）2 + heat ? 12BaO + 2As2O5 + 8As + 2O2
Slow heating below 300 °C causes loss of arsenious
oxide if heated in hydrogen or arsenic pentoxide if
heated in air:
Ba3(AsO3)2 + Heat (H2) ? 3BaO + As2O3