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Sodium ortho-arsenite, although the name is often shortened to sodium arsenite. It contains the AsO33- ion ortho-arsenite ion. Arsenic has oxidation number +3.

Confusingly there is another compound NaAsO2 sodium meta-arsenite whose name is also shortened to sodium arsenite. This contains a polymeric meta-arsenite ion (AsO2-)n . Again arsenic has oxidation number of +3

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12y ago

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