![]() ![]() Note that theseĪnions are analogous to the mono, di and tri-basicĪnions of phosphate. In other words, arsenous acid is “amphoteric”Īnd easily forms anions in the presence of moreĬationic species like the alkali metals. ![]() Addition of a base suchĪs one of the alkali cations converts arsenous acid to theĪrsenite ions -, 2-, and Of As(OH)3 involves a slow hydrolysis of hydolysis Have been used mainly as insecticides in the past.Īs(OH)3 is a weak acid with a Pka of 9.2. Has three OH groups attached directly to the arsenicĪtom and hence is not analogous to phosphorous acid.Ī number of complex arsenites are known, amongĬu2(C2H3O2)(AsO3), Paris green, and cupric hydrogenĪrsenite, CuHAsO3, Scheele’s green. It is a weak acid with a dissociationĬonstant of 8×10 -16 at 25☌. Than their heavier congeners like As where the +3 valanceĮxist only in solution. Reflect a trend whereby high oxidation states are more stable for lighter members of main group elements The differing behaviors of the As and P compounds Structure HPO(OH)2 in which P(OH)3 is a very minorĮquilibrium component of such solutions (if it exists atĪll). Related phosphorous species H3PO3 mainly adopts the Molecule consisting of three hydroxyl groups connectedīy single bonds to arsenic. ThisĬompound is essentially the “hydroxide” of the arsenic Isolated as a pure material, although this fact does notĭetract from the significance of As(OH)3. Hydrolyzed form of As2O3 and has the formula As(OH)3.Īs(OH)3 occurs in aqueous solutions and has not been This compound, also known as arsenious acid, is the WHITE POWDER AND FINE CHUNKS Physical properties In a job that involves arsenic production or use, such as copper or lead smelting, wood With arsenic, living in areas with unusually high natural levels of arsenic in rock, working Humans can be exposed toĪrsenicin several ways, such as ingesting small amounts present in food and water orīreathing air containing arsenic, breathing sawdust or burning smoke from wood treated The Paris subways and (viii) in cases of suicide and murder. Toxic but exceedingly vibrant pigment, known as Paris green, for use as a rodenticide in Medications (vii) arsenic trioxide was mixed with copper II acetate to form the extremely Treatment of refractory promyelocytic (M3), a subtype of acute myeloid leukemia (vi)Īrsenic trioxide is also used to treat leukemia in patients who have not responded to other Termite poison (iv) as a starting material for the preparation of elemental arsenic, arsenicĪlloys, and to enhance electrical junctions in semiconductors (v) as a cytostatic in the In animal hides (iii) in hydrogen recombination poison for metallurgical studies, as a Arsenic trioxide has severalĪpplications: (i) a decolorizing agent for glasses and enamels (ii) a preservative for wood, Pharmaceuticals (Neosalvarsan) and veterinary products. Sodium cacodylate) a starting point for the manufacture of certain arsenic-based Point for the manufacture of arsenic-based pesticides (sodium arsenite, sodium arsenate, It dissolves readily in alkaline solutions to give arsenites. Chemical PropertiesĪrsenic trioxide is an amphoteric oxide that shows a marked preponderance for its acidic White powder or colorless crystalline solid. Minerals in the air, such as roasting of orpiment.ĢAs 2S 3 + 9O 2 → As 4O 6 + 6SO 2 Chemical PropertiesĪrsenic trioxide is a noncombustible, odorless, It can be obtained by the oxidation of arsenic-containing ![]() Used as the precursor for organoarsenic compounds. Arsenic trioxide, often denoted as As 2O 3 butmore correctly stated as As 4O 6, is an inorganic compound mainly ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |