出典:Wiktionary
出典:『Wiktionary』 (2026/03/18 01:51 UTC 版)
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出典:Wikipedia
出典:『Wikipedia』 (2011/05/25 18:06 UTC 版)
In chemistry an arsenite is a chemical compound containing an arsenic oxoanion where arsenic has oxidation state +3. Examples of arsenites include sodium arsenite which contains a polymeric linear anion, [AsO2−]n, and silver arsenite, Ag3AsO3, which contains the trigonal, AsO33− anion. The arsenite ion is sometimes called ortho-arsenite.
Arsenite contrasts to the corresponding anions of the lighter members of group 15, phosphite which has the structure HPO32− and nitrite, NO2− which is bent. Sodium arsenite is used in the water gas shift reaction to remove carbon dioxide. Arsenites are salts of arsenious acid.