Calcium oxide facts for kids
Calcium oxide is a common chemical compound made from two elements: calcium and oxygen. Its chemical formula is CaO. This means one atom of calcium is joined with one atom of oxygen. It is also known by other names like quicklime, burnt lime, or unslaked lime. Quicklime is a white powder that is very useful in many ways.
Quicklime is also a type of base. In chemistry, a base is a substance that can react with acids. When quicklime reacts with acids, it forms calcium salts.
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How Quicklime is Made
Quicklime is made in special ovens called lime kilns. To make quicklime, a rock called limestone (which is mostly calcium carbonate) is heated to very high temperatures. This process removes carbon dioxide from the limestone, leaving behind calcium oxide.
What Happens When Quicklime Meets Water?
When quicklime (calcium oxide) is mixed with water, a strong chemical reaction happens. This reaction releases a lot of heat, making the mixture very hot. As it reacts with water, quicklime changes into another compound called calcium hydroxide. Calcium hydroxide is also known as slaked lime.
Uses of Quicklime
Quicklime is an important ingredient in many things we use every day. One of its most important uses is in making cement. Cement is a key material for building houses, roads, and bridges. Quicklime is also used in agriculture to improve soil quality and in various industrial processes.
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Images for kids
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Calcium oxide
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Calcium oxide powder
See also
In Spanish: Óxido de calcio para niños
