More information about Calcium sulfide (CaS). Sulfur, Selenium, and Tellurium. : 13121 CAS-No 20548-54-3 Synonyms Calcium sulphide. It is a water-soluble yellowish-white solid, found in nature in some volcanoes and in some meteorites in the form of a mineral called oldhamite. Component Compounds. In combination with phosphorus it forms calcium phosphate, the dense, hard material of the bones and teeth. DB11211. Obtaining Calcium sulfide CaS. Fourth Edition. Recovered from pubchem.ncbi.nlm.nih.gov. In Encyclopedia of the Alkaline Earth Compounds. Question: A 7.57 G Sample Of Calcium Sulfide Was Decomposed Into Its Constituent Elements, Producing 4.21 G Of Calcium And 3.36 G Of Sulfur Which Of The Statements Are Consistent With The Law Of Constant Composition (definite Proportions)? 2+ and sulfur S2-. Product Name Calcium sulfide Cat No. Every sample of calcium sulfide will have 44.4% mass of sulfur. Calcium Sulfide CaS Molar Mass, Molecular Weight. Calcium sulfide decomposes upon contact with water, including moist air, giving a mixture of Ca (SH) 2, Ca (OH) 2, and Ca (SH) (OH). It is also present in volcanoes. In addition, calcium sulfide is produced naturally by the reduction of CaSO4 (plaster) possibly due to the action of bacteria. CRC Handbook of Chemistry and Physics. Calcium sulfide has been considered in medical scientific studies as a drug to treat high blood pressure (high pressure in the arteries). What is the chemical formula for calcium hydrogen sulfide? Calcium sulfide (CaS), a donor of hydrogen sulfide (H (2) S): a new antihypertensive drug? Reactions with Calcium sulfide CaS. SC-79620. Calcium sulfide decomposes upon contact with water: CaS + H 2 O Ca(SH)(OH) Ca(SH)(OH) + H 2 O Ca(OH) 2 + H 2 S. In the presence of traces of heavy metals CaS becomes phosphorescent (like many other sulfides such as zinc sulfide or cadmium sulfide). Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. We assume you are converting between moles Calcium Sulfide and gram. Advanced Inorganic Chemistry. 8Ca(s) + S8(s) → 8CaS(s) The mass ratio of S to Ca in every sample of calcium sulfide is 0.80. When CaS dissolves in water, it forms various compounds due to the sulfide ion S2- becomes ion SH– and OH ions are formed–. Which of the statements are consistent with the law of constant composition (definite proportions)? The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. 7. Calcium;sulfide. Calcium Sulfide. Which of the statements are consistent with the law of constant composition (definite proportions)? 85. 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Calcium sulfide makes it possible to prepare other compounds such as calcium nitrate Ca (NO3)2: It has also been used to obtain calcium carbonate CaCO3. The latter in water takes a proton and becomes the hydrosulfide ion SH– releasing a hydroxyl ion OH–. and House, K.A. Question: Is CaS ( Calcium sulfide ) Soluble or Insoluble in water ? Calcium sulfide is an inorganic solid formed by the element calcium (Ca) and the element sulfur (S), the chemical formula is CaS. CaS is also generated by burning coal waste. CaS can be oxidized by calcium sulfate to form calcium oxide and sulfur dioxide: 3 CaSO 4 + CaS 4 CaO + 4 SO 2. The same reactions that occur in water cause CaS to react with acids forming H2S. -The mass percentage of calcium plus the mass percentage of sulfur in every sample of calcium sulfide equals 100%. Cotton, F. Albert and Wilkinson, Geoffrey. Occurrence of Sulfur. In the luminescent compounds of CaS this acts as a base and activators are added to the structure such as chlorides of certain elements such as cerium (Ce3+) and europium (Eu2+). CaS has been considered as a possible medicine to treat heart and blood vessel problems such as hypertension or high blood pressure, which is a disease that affects a large part of the world's population. The result of the reactions in water indicated above is that Ca (SH) is formed2, Ca (OH)2 and Ca (SH) (OH). We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Li, Y.F. Uses advised against Food, drug, pesticide or biocidal product use. Have questions or comments? The SH– can take another proton H+ from water, forming hydrogen sulfide, which is a very toxic compound. Therefore, small amounts of H are formed in water.2S and when exposed to humidity in the environment, CaS gives off an unpleasant smell typical of hydrogen sulfide. This is a disease that affects the cardiovascular system of many people (heart and blood vessels). Lide, D.R. 72.15 g/mol. With calcium sulfide other compounds such as calcium nitrate and calcium carbonate can be obtained. Group 2. A calcium sulfite element is the only way to remove 99% of the chlorine. (2016). Ropp, R.C. De Beer, M. et al. Legal. • CaS + CuCl2 = CuS + CaCl2 ›› Calcium Sulfide molecular weight. It is a very toxic compound for aquatic life, so it is dangerous for these environments. As CaS dissolves in water, it separates into its calcium Ca ions. Sulfur - Sulfur - Commercial production: Elemental sulfur is found in volcanic regions as a deposit formed by the emission of hydrogen sulfide, followed by aerial oxidation to the element. One of the most widespread uses of calcium sulfide has been as a base for luminescent compounds. Every sample of calcium sulfide will contain 44.4% sulfur by mass and 55.6% calcium by mass. It must be handled with caution and with adequate safety equipment. White, decomposes upon melting. (2013). Reactions. Group 16 (O, S, Se, Te) Alkaline Earth Compounds. Solubility Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to … A 4.27 g sample of calcium sulfide was decomposed into its constituent elements, producing 2.37 g of calcium and 1.90 g of sulfur. Oldhamite is believed to have formed by condensation in the nebula that originated the solar system. The resulting solution is alkaline. It must be handled with caution and in contact with humidity in the atmosphere it can produce H2S which is very toxic. (2005). John Wiley & Sons. Answer: CaS ( Calcium sulfide ) is low solubility ( Slightly soluble ) in water What is Soluble and Insoluble ? Yellowish white crystalline solid, cubic crystals like those of sodium chloride. Molar mass of CaS = 72.143 g/mol. Recovered from ncbi.nlm.nih.gov. These materials are also used in luminous paints and varnishes. U.S. National Library of Medicine. Only when a large amount of alkali such as sodium hydroxide NaOH is added to the solution does the equilibrium shift towards the formation of sulfide ions S2-. Light-Emitting Diodes). W here the elements magnesium, calcium and sulfur are in the Periodic Table . Actually, he probably prepared: CaS:Bi 3+:V-initially. This is a list of CAS numbers by chemical formulas and chemical compounds, indexed by formula.The CAS number is a unique number applied to a specific chemical by the Chemical Abstracts Service (CAS). DTXSID30885140. In Descriptive Inorganic Chemistry (Third Edition). It is a water-soluble yellowish-white solid, found in nature in some volcanoes and in some meteorites in the form of a mineral called oldhamite. Conversion of calcium sulphide to calcium carbonate during the process of recovery of elemental sulfur from gypsum waste. (editor). Recovered from ncbi.nlm.nih.gov. Calcium was discovered and first isolated by Sir Humphrey Davy in 1808. Which of … calcium (Ca) [kal´se-um] a chemical element, atomic number 20, atomic weight 40.08. Calcium is used to produce the minerals contained in bones, shells and teeth through a process called biomineralisation. CaS can be oxidized by calcium sulfate to form calcium oxide and sulfur dioxide: Calcium sulfide decomposes upon contact with water: CaS + H2O Ca(SH)(OH) Ca(SH)(OH) + H2O Ca(OH)2 + H2S. (See Appendix 6.) CaS is naturally present in the mineral oldhamite. The sum of the mass percent of sulfur and the mass percent of calcium will … et al. Which is what the old milk TV adverts were trying to tell us after all. The ratio of elements in a compound does not vary with how the compound is prepared. It is the fifth most abundant element in the earth's crust and can be found in minerals such as dolomite, gypsum, plagioclases, amphiboles, pyroxenes and garnets. Calcium is what is known as an essential element, meaning that it is an element which is absolutely necessary for life processes. CaS has been studied as a component in a process that would recycle gypsum, a product of flue-gas desulfurization. Recovered from sciencedirect.com. Calcium sulfide decomposes upon contact with water: CaS + H 2 O Ca(SH)(OH) Ca(SH)(OH) + H 2 O Ca(OH) 2 + H 2 S. In the presence of traces of heavy metals CaS becomes phosphorescent (like many other sulfides such as zinc sulfide or cadmium sulfide). Oxygen can be combined with various cations to form a … As you can see, the divalent cation site would have to be occupied by a negative vacancy since charge compensation dictates that the vacancy will appear. Properties: Oldhamite. Calcium sulphide. The calcium sulfide It is an inorganic solid formed by the element calcium (Ca) and the element sulfur (S), the chemical formula is CaS. Magnesium oxide MgO, magnesium sulfide MgS and calcium sulfide CaS will be similar electronically and give identical giant ionic lattice structures. (1980). Calcium sulfide is the chemical compound with the formula CaS. (b) What mass of zinc sulfide will this reaction produce? The material resulting from the union of the CaS and the activator is used for example in cathode ray tube screens that make up the old screens of computers or computers or old TV sets. CaS - CALCIUM SULFIDE. It crystallizes in a cubic structure like rock salt. Solubility in water, . This plays an important role in regulating the tone or strength of blood vessels, so the administration of CaS could be a possible remedy to treat hypertension. CaS has an odor of rotten eggs, which stems from H2S formed by hydrolysis of the calcium sulfide. This list complements alternative listings to be found at list of inorganic compounds and glossary of chemical formulae Lenard in 1928 reported on a calcium sulfide phosphor, i.e.- CaS:Bi 3+, having a blue emission. Calcium sulfide, CaS, crystallizes in cubes like rock salt and occurs as oldhamite in nature. Recommended Use Laboratory chemicals. Click here to let us know! Recovered from sciencedirect.com. CHEBI:81055. A 7.03 g sample of calcium sulfide was decomposed into its constituent elements, producing 3.91 g of calcium and 3.12 g of sulfur. More... Molecular Weight. They have the same structure as sodium chloride, with each atom having six neighbours. A 4.03 g sample of calcium sulfide was decomposed into its constituent elements, producing 2.24g of calcium and 1.79g of sulfur. [ "article:topic", "oxide", "sulfate", "sulfide", "Solvay process", "calcium", "showtoc:no", "oxidized", "Leblanc process", "calcium sulfate", "calcium oxide", "Calcium Sulfide", "dioxide", "transcluded:yes", "source-chem-35887" ], https://chem.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fchem.libretexts.org%2FCourses%2FWestminster_College%2FCHE_180_-_Inorganic_Chemistry%2F13%253A_Chapter_13_-_s-Block_Elements%2F13.9%253A_Group_2%2FChemistry_of_Calcium_(Z%253D20)%2FCalcium_Sulfide, information contact us at info@libretexts.org, status page at https://status.libretexts.org. This is a component of some meteorites and is important for scientific research carried out on the solar system. These are substances that emit visible light under certain circumstances. CaS can be oxidized by calcium sulfate to form calcium oxide and sulfur dioxide: 3 CaSO 4 + CaS 4 CaO + 4 SO 2. Since every sample of calcium sulfide will have the same ratio of elements, you can determine the mass percent of each element in the compound. In the presence of traces of heavy metals CaS becomes phosphorescent (like many other sulfides such as zinc sulfide or cadmium sulfide). Although less useful for chlorine, GAC and KDF filters remove other undesirable elements, while inhibiting the growth of algae, fungi, and mold. Calcium chloride reacts with carbonic acid to produce calcium carbonate and hydrochloric acid according to the following equation: CaCl2 + H2 CO3 → CaCO3 + 2HCl If you want to produce 10 g of calcium carbonate through this chemical reaction, what quantity (in g) of calcium chloride will you need at the start of the reaction?
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