The hydrated formula for calcium oxide (CaO), which results from its reaction with water, is Ca(OH)2, also known as calcium hydroxide.
Understanding the Hydration of Calcium Oxide
When calcium oxide (quicklime) reacts with water (H2O), it undergoes a hydration process, forming calcium hydroxide (slaked lime). This reaction is exothermic, meaning it releases heat.
The chemical equation for the reaction is:
CaO (s) + H2O (l) → Ca(OH)2 (s)
- CaO (s): Represents solid calcium oxide (quicklime).
- H2O (l): Represents liquid water.
- Ca(OH)2 (s): Represents solid calcium hydroxide (slaked lime).
Calcium hydroxide, Ca(OH)2, is therefore the hydrated form of calcium oxide. It's a colorless crystal or white powder.
Properties and Uses of Calcium Hydroxide
Calcium hydroxide has several important uses:
- Mortar and Plaster: It's a key ingredient in mortar and plaster.
- Soil Treatment: It is used to neutralize acidic soils in agriculture.
- Industrial Processes: It is used in various industrial applications, including water treatment.
