Calcium arsenate CAS

Calcium Arsenate. CAS 7778-44-11. Ca,tAs04) . white precipitate, formed by reaction of soluble calcium salt solution and sodium arsenate solution. pK,p = 18.17. 

Agent Index A108 Calcium Arsenate CAS 7778-44-1 Agent Index A109 Calcium Arsenite CAS 52740-16-6 Agent Index A110... 

Calcium Dihydrogen Orthoarsenate has been obtained in the form of a monohydrate by adding nitric acid to a mixture containing equal proportions of calcium carbonate and arsenious oxide and allowing the solution to crystallise.3 It may also be prepared by adding excess of arsenic acid to calcium carbonate or to the normal or monohydrogen orthoarsenate.4 It forms colourless plates which lose their water at 180° C. and at 360° C. yield calcium metarsenate, Ca(As03)2, as a crystalline mass, insoluble in hydrochloric acid. 

Ca compounds calcium sulfate, calcium hydroxide, calcium arsenate, calcium acetate, calcium chromate. 

CALCIUM ARSENATE (AS AS) Ca,(AsOJ, Trkalcium arsenate Trkaklum ortho-arsenate Cucumber dust arsenk acid, caklum lah (2 3) None hazardous Not combustible ... 

Rea.ctivity ofLea.d—Ca.lcium Alloys. Precise control of the calcium content is required to control the grain stmcture, corrosion resistance, and mechanical properties of lead—calcium alloys. Calcium reacts readily with air and other elements such as antimony, arsenic, and sulfur to produce oxides or intermetaUic compounds (see Calciumand calciumalloys). In these reactions, calcium is lost and suspended soHds reduce fluidity and castibiUty. The very thin grids that are required for automotive batteries are difficult to cast from lead—calcium alloys. 

In most developed countries, coal combustion and smelting facilities are required to treat gaseous and particulate arsenic in flue gases before the gases are released into the atmosphere (Chapters 5 and 7). Potentially effective sorbents for flue gas arsenic include hydrated lime (Ca(OH)2, portlandite), lime (CaO), calcium carbonate, limestone, fly ash, and sometimes activated carbon ((Jadhav and Fan, 2001 Lopez-Anton et al., 2007 Helsen and Van den Bulck, 2004), 287, 289 (Taerakul et al., 2006 Gupta et al., 2007) Chapters 5 and 7). The injection of hydrated lime is especially effective and probably... 

K Potassium 20 Ca Calcium 21 Sc Scandium 22 Ti Titanium 23 V Vanadium 24 Cr Chromium 25 Mn Manganese 26 Fe Iron 27 Co Cobalt 28 Ni Nickel 29 Cu Copper 30 Zn Zinc 31 Ga Gallium 32 Ge Germanium 33 As Arsenic 34 Se Sdenium 35 Br Bromine 36 Kr Krypton... 

Both As(V) and As(III) may precipitate within soils and sediments, but the constituents inducing precipitation vary dramatically. Arsenate, similar to phosphate, tends to precipitate with hard multivalent cations such as aluminum and ferric iron under acidic conditions and calcium and magnesium under alkaline conditions arsenate may also replace 804 or, in particular, PO4 in minerals due to similar size and charge characteristics (Smedley and Kinniburgh, 2002). Various heavy metals (e.g., Mn, Cd, Pb) and alkali earth metals (Ca, Mg, Ba) also have... 

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