CS1 maint: multiple names: authors list (, https://en.wikipedia.org/w/index.php?title=Sodium_sulfide&oldid=981691817, Chemical articles with multiple compound IDs, Multiple chemicals in an infobox that need indexing, Chemical articles with multiple CAS registry numbers, Articles with changed ChemSpider identifier, Pages using collapsible list with both background and text-align in titlestyle, Articles containing unverified chemical infoboxes, Creative Commons Attribution-ShareAlike License, This page was last edited on 3 October 2020, at 21:30. SH−. It is used in the production of rubber chemicals, sulfur dyes and other chemical compounds. Industrially Na2S is produced by carbothermic reduction of sodium sulfate often using coal:[4], In the laboratory, the salt can be prepared by reduction of sulfur with sodium in anhydrous ammonia, or by sodium in dry THF with a catalytic amount of naphthalene (forming sodium naphthalenide):[5]. ↽ − ⇀. Na2S adopts the antifluorite structure,[2][3] which means that the Na+ centers occupy sites of the fluoride in the CaF2 framework, and the larger S2− occupy the sites for Ca2+. Its conjugate acid is sodium hydrosulfide (SH−). Such technical grades of sodium sulfide have a yellow appearance owing to the presence of polysulfides. When heated with oxygen and carbon dioxide, sodium sulfide can oxidize to sodium carbonate and sulfur dioxide : 2 Na 2 S + 3 … It is also used during leather processing, as an unhairing agent in the liming operation. Like sodium hydroxide, sodium sulfide is strongly alkaline and can cause skin burns. These grades of sodium sulfide are marketed as 'sodium sulfide flakes'. Charles C. Price, Gardner W. Stacy "p-Aminophenyldisulfide" Org. Cadmium Sulfide is a yellow to orange colored, crystalline, inorganic compound that forms toxic fumes of cadmium oxides when heated. 1948, vol. azo group, remain intact. 28, 14. Except where otherwise noted, data are given for materials in their. {\displaystyle {\ce {<<=>}}} H. 2S + OH −. [9] Aqueous solution of sodium sulfide can be refluxed with nitro carrying azo dyes dissolved in dioxane and ethanol to selectively reduce the nitro groups to amine; while other reducible groups, e.g. + H. 2 O. [7] By a broadly similar process sodium sulfide can react with alkenes in the thiol-ene reaction to give thioethers. [10] Sulfide has also been employed in photocatalytic applications.[11]. The sulfide ion in sulfide salts such as sodium sulfide can incorporate a proton into the salt by protonation: Because of this capture of the proton ( H+), sodium sulfide has basic character. It is used in other applications including ore flotation, oil recovery, making dyes, and detergent. It is used in chemical manufacturing as a sulfonation and sulfomethylation agent. *Response times vary by subject and question complexity. L. Lange, W. Triebel, "Sulfides, Polysulfides, and Sulfanes" in Ullmann's Encyclopedia of Industrial Chemistry 2000, Wiley-VCH, Weinheim. Synth. Commonly available grades have around 60% Na2S by weight, which means that x is around 3. Sodium sulfide is unstable in the presence of water due to the gradual loss of hydrogen sulfide into the atmosphere. An aqueous solution contains a significant portion of sulfide ions that are singly protonated. Upon treatment with sulfur, polysulfides are formed: Sodium sulfide is primarily used in the kraft process in the pulp and paper industry. Wells, A.F. [8] Sodium sulfide reduces1,3-dinitrobenzene derivatives to the 3-nitroanilines. Na2S b.) Sodium sulfide is unstable in the presence of water due to the gradual loss of hydrogen sulfide into the atmosphere. When heated with oxygen and carbon dioxide, sodium sulfide can oxidize to sodium carbonate and sulfur dioxide: Oxidation with hydrogen peroxide gives sodium sulfate:[6]. Sodium sulfide is strongly basic, able to absorb two protons. Alkylation of sodium sulfide give thioethers: Even aryl halides participate in this reaction. Cadmium sulfide is used as pigment in paints, plastics, textiles, ceramic and glass and is also used in solar cells, smoke and radiation detectors, light-emitting diodes and … Median response time is 34 minutes and may be longer for new subjects. Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. a.) Acids react with it to rapidly produce hydrogen sulfide, which is highly toxic. It is used in water treatment as an oxygen scavenger agent and also as a metals precipitant; in chemical photography for toning black and white photographs; in the textile industry as a bleaching agent, for desulfurising and as a dechlorinating agent; and in the leather trade for the sulfitisation of tanning extracts.

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