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. 29 30 31. calcium oxide, chemical compound, CaO, a colorless, cubic crystalline or white amorphous substance. ... Calcium oxide that survives processing without reacting in building products such as cement is called free lime. Quicklime is produced by heating naturally-occurring limestone rock, which contains calcium carbonate. Calcium has an ionic radius of 0.099 nanometers (nm), and oxygen has an ionic radius of 0.14 nm. This process is called the slaking of lime. Quicklime is a caustic compound known by its chemical name calcium oxide (CaO). Asked by Wiki User. Properties of Calcium Oxide. Calcium oxide, more often known as quicklime, is a high-volume chemical used in many industries.This is because calcium oxide has many uses, is inexpensive and is easy to create. “Quick” used to be used in a sense that meant alive, as in the “quick and the dead”.) Top Answer. The use of quicklime and slaked lime is much less common. Calcined dolomite (CaO MgO), can also be used in water treatment plants, for example to eliminate silica from water. Calcium Oxide reacts with … Wiki User Answered . 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. This is because the magnesium in the dolomite acts as the main reactive agent for the elimination of silica. 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. CaO+H 2 O → Ca (OH) 2. chemical compound, CaO, a colorless, cubic crystalline or white amorphous substance. It is prepared by heating It is also called unslaked Lime. Problem 137P. Quick lime is an amorphous white solid with a high melting point of 2600 ° It is a very stable compound and withstands high temperatures. 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, a common chemical compound that appears as a white crystalline solid at room temperature, is easily attainable through the thermal decomposition of limestone. Calcium Oxide is also called Quicklime (when water is added, it heats up and bubbles like it’s boiling, make it seem alive. Why is calcium oxide called quick lime? Calcium Oxide. Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. It is also called lime, quicklime, or caustic lime, but commercial lime often contains impurities, e.g., silica, iron, alumina, and magnesia. [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. Quicklime, more formally known as calcium oxide (CaO), is a caustic alkaline substance that is produced by heating limestone in specially designed kilns. 2010-09-12 16:39:43 2010-09-12 16:39:43. 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. Answer. In the presence of water, it forms slaked lime. It is a white, caustic, alkaline, crystalline solid at room temperature. Heating up calcium carbonate drives out carbon dioxide, leaving Calcium Oxide. It appears as a white powder when cold, and yellow when heated. 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