Write the chemical formula of quicklime and slaked lime.

Quicklime and slaked lime are two important compounds in chemistry, particularly in construction and environmental applications. Here’s the breakdown of both:

### 1. Quicklime

- **Chemical Name**: Calcium oxide
- **Chemical Formula**: \( \text{CaO} \)

**Explanation**: Quicklime is produced by heating limestone (calcium carbonate, \( \text{CaCO}_3 \)) in a process called calcination. This process releases carbon dioxide, resulting in calcium oxide, or quicklime.

\[
\text{CaCO}_3 \, (s) \, \xrightarrow{\text{heat}} \, \text{CaO} \, (s) + \text{CO}_2 \, (g)
\]

### 2. Slaked Lime

- **Chemical Name**: Calcium hydroxide
- **Chemical Formula**: \( \text{Ca(OH)}_2 \)

**Explanation**: Slaked lime is produced by adding water to quicklime in a process called slaking. This reaction forms calcium hydroxide, or slaked lime.

\[
\text{CaO} \, (s) + \text{H}_2\text{O} \, (l) \, \rightarrow \, \text{Ca(OH)}_2 \, (s)
\]

### Summary

- **Quicklime**: \( \text{CaO} \) (Calcium oxide)
- **Slaked Lime**: \( \text{Ca(OH)}_2 \) (Calcium hydroxide)

Both compounds are crucial in various applications, such as water treatment, soil stabilization, and the production of mortar in construction.