How is calcium oxide made?

Answer 1

Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. It is a white, caustic, alkaline crystalline solid at room temperature. The broadly used term lime connotes calcium-containing inorganic materials, in which carbonates, oxides and hydroxides of calcium, silicon, magnesium, aluminium, and iron predominate, such as limestone. By contrast, quicklime specifically applies to a single chemical compound.

Answer 2

Calcium oxide, also known as quicklime, is produced by heating calcium carbonate (typically limestone) in a process called calcination. This involves driving off carbon dioxide gas from the calcium carbonate, leaving behind calcium oxide. The resulting quicklime can then be used in various industrial processes such as steel production and water treatment.