This is because the magnesium in the dolomite acts as the main reactive agent for the elimination of silica. chemical compound, CaO, a colorless, cubic crystalline or white amorphous substance. Asked by Wiki User. CaO+H 2 O â Ca (OH) 2. Calcium oxide is used industrially as an absorbent, in the creation of steel, in fertilizer, as a water softener and as a potential hydrogen (pH) regulator for wastewater. Calcium Oxide is also called Quicklime (when water is added, it heats up and bubbles like itâs boiling, make it seem alive. 29 30 31. This process is called the slaking of lime. Lime is a term that includes calcium oxide (CaO, also called quicklime) and calcium hydroxide [Ca(OH)2 also called slaked lime]. Calcined dolomite (CaO MgO), can also be used in water treatment plants, for example to eliminate silica from water. 2010-09-12 16:39:43 2010-09-12 16:39:43. Calcium has an ionic radius of 0.099 nanometers (nm), and oxygen has an ionic radius of 0.14 nm. It is used in the steel industry to remove acidic impurities, in air-pollution control to remove acidic oxides such as SO2, and in water treatment. It is a white, caustic, alkaline, crystalline solid at room temperature. This was how the material, also known as quicklime, was acquired for human use, after ancient peoples burned limestone in a kiln to take advantage of its structural properties. The use of quicklime and slaked lime is much less common. Quicklime is produced by heating naturally-occurring limestone rock, which contains calcium carbonate. Calcium oxide, a common chemical compound that appears as a white crystalline solid at room temperature, is easily attainable through the thermal decomposition of limestone. Other articles where Calcium oxide is discussed: calcium: Compounds: Calcium oxide, CaO, also known as lime or more specifically quicklime, is a white or grayish white solid produced in large quantities by roasting calcium carbonate so as to drive off carbon dioxide. It is also called lime, quicklime, or caustic lime, but commercial lime often contains impurities, e.g., silica, iron, alumina, and magnesia. Quicklime, more formally known as calcium oxide (CaO), is a caustic alkaline substance that is produced by heating limestone in specially designed kilns. Heating up calcium carbonate drives out carbon dioxide, leaving Calcium Oxide. calcium oxide, chemical compound, CaO, a colorless, cubic crystalline or white amorphous substance. Calcium Oxide reacts with ⦠[I hope help] There are a wide range of uses for this substance, ranging from mortar to flux, and it has been used by humans for centuries. Answer. Wiki User Answered . Calcium Oxide. Quicklime is a caustic compound known by its chemical name calcium oxide (CaO). In the presence of water, it forms slaked lime. Why is calcium oxide called quick lime? Properties of Calcium Oxide. Top Answer. Quick lime is an amorphous white solid with a high melting point of 2600 ° It is a very stable compound and withstands high temperatures. âQuickâ used to be used in a sense that meant alive, as in the âquick and the deadâ.) Problem 137P. ... Calcium oxide that survives processing without reacting in building products such as cement is called free lime. Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. At room temperature, CaO will spontaneously absorb carbon dioxide from the atmosphere,⦠Calcium oxide (CaO), also called quicklime, is an important component in cement and soda-lime glass. It is also called unslaked Lime. 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