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A number of processes have been designed to remove hydrogen sulfide from drinking water. [54] Continuous chlorination For levels up to 75 mg/L chlorine is used in the purification process as an oxidizing chemical to react with hydrogen sulfide. This reaction yields insoluble solid sulfur. Usually the chlorine used is in the form of sodium ...
Sodium hydrosulfide is the chemical compound with the formula NaSH. This compound is the product of the half-neutralization of hydrogen sulfide ( H 2 S ) with sodium hydroxide (NaOH). NaSH and sodium sulfide are used industrially, often for similar purposes.
Formula Melting point (°C) Boiling point (°C) CAS number H 2 S: Hydrogen sulfide is a very toxic and corrosive gas characterised by a typical odour of "rotten egg". −85.7: −60.20: 7783-06-4: CdS: Cadmium sulfide can be used in photocells. 1750: 1306-23-6: Calcium polysulfide ("lime sulfur") is a traditional fungicide in gardening. CS 2
Sodium sulfide is a chemical compound with the formula Na 2 S, or more commonly its hydrate Na 2 S·9H 2 O.Both the anhydrous and the hydrated salts in pure crystalline form are colorless solids, although technical grades of sodium sulfide are generally yellow to brick red owing to the presence of polysulfides and commonly supplied as a crystalline mass, in flake form, or as a fused solid.
Hydrogen sulfide chemosynthesis is a form of chemosynthesis which uses hydrogen sulfide. [1] It is common in hydrothermal vent microbial communities [ 2 ] [ 3 ] Due to the lack of light in these environments this is predominant over photosynthesis .
The structure of hydrogen disulfide is similar to that of hydrogen peroxide, with C 2 point group symmetry. Both molecules are distinctly nonplanar. The dihedral angle between the H a −S−S and S−S−H b planes is 90.6°, compared with 111.5° in H 2 O 2. The H−S−S bond angle is 92°, close to 90° for unhybridized divalent sulfur. [1]
Water-reactive substances [1] are those that spontaneously undergo a chemical reaction with water, often noted as generating flammable gas. [2] Some are highly reducing in nature. [ 3 ] Notable examples include alkali metals , lithium through caesium , and alkaline earth metals , magnesium through barium .
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.