Is quicklime calcium oxide?

What we usually call quicklime is chemically calcium oxide.

Quicklime is calcined from marble and other stones. The principle is that calcium carbonate is calcined to produce calcium oxide and carbon dioxide.

In chemical application, the most common thing is to make soda lime with drying function. (Alkaline lime is mainly composed of calcium oxide and sodium hydroxide)

In addition to quicklime, there is also a common lime called hydrated lime in daily life.

Hydrated lime is chemically calcium hydroxide. It can be obtained directly by the reaction of quicklime and water.

In life, when you water quicklime, you will release a lot of heat, and quicklime will become hydrated lime.

In chemical application, hydrated lime can be used for laboratory ammonia production, acid-base neutralization and so on.