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Arsenous acid (or arsenious acid) is the inorganic compound with the formula H 3 AsO 3. It is known to occur in aqueous solutions , but it has not been isolated as a pure material, although this fact does not detract from the significance of As(OH) 3 .
The protonation steps between the arsenate and arsenic acid are similar to those between phosphate and phosphoric acid. Unlike phosphorous acid, arsenous acid is genuinely tribasic, with the formula As(OH) 3. [5] A broad variety of sulfur compounds of arsenic are known.
Arsenic acid or arsoric acid is the chemical compound with the formula H 3 AsO 4. More descriptively written as AsO(OH) 3, this colorless acid is the arsenic analogue of phosphoric acid. Arsenate and phosphate salts behave very similarly. Arsenic acid as such has not been isolated, but is only found in solution, where it is largely ionized.
Arsonic acid refers to H 3 As O 3, the case where the substituent is a single hydrogen atom. The other arsonic acids can simply be viewed as hydrocarbyl derivatives of this base case. Arsenic acid results when the substituent is a hydroxyl group. Methylarsonic acid results when the substituent is a methyl group.
The protonation steps between the arsenate and arsenic acid are similar to those between phosphate and phosphoric acid. Unlike phosphorous acid, arsenous acid is genuinely tribasic, with the formula As(OH) 3. [36] A broad variety of sulfur compounds of arsenic are known.
In its standard state arsine is a colorless, denser-than-air gas that is slightly soluble in water (2% at 20 °C) [1] and in many organic solvents as well. [citation needed] Arsine itself is odorless, [5] but it oxidizes in air and this creates a slight garlic or fish-like scent when the compound is present above 0.5 ppm. [6]
Arsonic acid is the simplest of the arsonic acids. It is a hypothetical compound , although the tautomeric arsenious acid (As(OH) 3 ) is well established. In contrast to the instability of HAsO(OH) 2 , the phosphorus compound with analogous stoichiometry exists as the tetrahedral tautomer.
Arsenic triiodide is the inorganic compound with the formula As I 3 ... trioxide and hydroiodic acid. The reaction proceeds via formation of arsenous acid which ...