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Arsenic trisulfide is the inorganic compound with the formula As 2 S 3. It is a dark yellow solid that is insoluble in water. It is a dark yellow solid that is insoluble in water. It also occurs as the mineral orpiment (Latin: auripigmentum), which has been used as a pigment called King's yellow.
The Marsh test treats the sample with sulfuric acid and arsenic-free zinc. Even if there are minute amounts of arsenic present, the zinc reduces the trivalent arsenic (As 3+). Here are the two half-reactions: Oxidation: Zn → Zn 2+ + 2 e − Reduction: As 2 O 3 + 12 e − + 6 H + → 2 As 3− + 3 H 2 O. Overall, we have this reaction:
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]
Arsenic sulfide may refer to: Arsenic trisulfide , As 2 S 3 , the mineral orpiment Arsenic pentasulfide , As 2 S 5 , similar structure to phosphorus pentasulfide (β-P 2 S 5 )
In organic and organometallic chemistry, trisulfide is the functional group R-S-S-S-R. Examples include: Diallyl trisulfide; Dimethyl trisulfide; Trisulfane (hydrogen trisulfide) Some inorganic compounds are also named trisulfides to reflect their stoichiometry. Examples include: Antimony trisulfide; Arsenic trisulfide; Bismuth trisulfide ...
Arsenic trioxide powder.. Compounds of arsenic resemble in some respects those of phosphorus which occupies the same group (column) of the periodic table.The most common oxidation states for arsenic are: −3 in the arsenides, which are alloy-like intermetallic compounds, +3 in the arsenites, and +5 in the arsenates and most organoarsenic compounds.
The trisulfide ion, S 2− 3 is part of the polysulfide series. The sulfur chain is bent at an angle of 107.88°. [ 5 ] Strontium trisulfide ( SrS 3 ) has a S–S bond length of 205 pm . [ 5 ]
Arsenic pentasulfide is prepared by precipitation from an acidic solution of soluble As(V) salts by treatment with hydrogen sulfide. [3] It may be also prepared by heating a mixture of arsenic and sulfur, extracting the fused mass with an ammonia solution and reprecipitating arsenic pentasulfide at low temperature by addition of hydrochloric acid.