Calcium Oxide CaO
Calcium oxide is commonly known as quicklime, and is a material of primary importance in the building industry.
Calcium peroxide (CaO2) is a solid peroxide with a white or yellowish color.
Calcium hydroxide (Ca(OH)-2)
Calcium hydroxide in solid powdered form is called slaked lime. A suspension of slaked lime in water is called milk of lime.
Calcium carbonate CaCO3
Calcium carbonate occurs abundantly as dolomite, MgCO3.CaCO3, a mixture of calcium and magnesium carbonates.
Calcium bicarbonate (Ca(HCO3)2), also called calcium hydrogen carbonate, does not refer to a known solid compound; it “exists” only in a solution containing the ions calcium Ca^2+, dissolved carbon dioxide CO2, bicarbonate HCO3–, and carbonate CO3^2–.
Calcium chloride (CaCl2) is an ionic compound of calcium and chlorine.
It can be produced directly from limestone, but large amounts are also produced as a by-product of the Solvay process.
Calcium sulphate (CaSO4)
Calcium sulphate can be obtained by heating gypsum above 200°C.
Compounds of Aluminium: alumina, aluminium chloride and alums;
Aluminium oxide(Al2O3), also known as alumina, is the main component of bauxite, the principal ore of aluminium.
Aluminium chloride (AlCl3) is manufactured on a large scale by the exothermic reaction of aluminium metal with chlorine or hydrogen chloride.
Alum is a salt that in chemistry is a combination of an alkali metal, such as sodium, potassium, or ammonium and a trivalent metal, such as aluminum, iron, or chromium.
The most common form, potassium aluminum sulfate, or potash alum, is one form that has been used in food processing.
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Labels: Compounds-metals, Core-Points
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