Cao + co2 - caco3
calcium oxides reactes with carbon dioxides to give calcium carbonates(chalk)

Balanced Chemical Equation for CaO + CO2:

The balanced chemical equation for the reaction between calcium oxide (CaO) and carbon dioxide (CO2) is as follows:

CaO + CO2 → CaCO3

Explanation:

The reaction between calcium oxide and carbon dioxide results in the formation of calcium carbonate. Let's break down the equation to understand it in detail.

1. Reactants:
- Calcium oxide (CaO): It is a white crystalline compound commonly known as quicklime. It is obtained by heating limestone (CaCO3) above 825°C, which drives off carbon dioxide.
- Carbon dioxide (CO2): It is a colorless gas that is present in the Earth's atmosphere and is released during various natural and human activities.

2. Product:
- Calcium carbonate (CaCO3): It is a white solid compound that occurs naturally in limestone, marble, and chalk. It is commonly used in the production of cement, as a building material, and in various other applications.

3. Reaction:
When calcium oxide and carbon dioxide react, they combine to form calcium carbonate. This reaction is an example of a synthesis reaction, where two or more substances combine to form a single compound. The reaction is represented by the balanced chemical equation:

CaO + CO2 → CaCO3

4. Balance:
To balance the equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. In this case, there is one calcium (Ca) atom, one carbon (C) atom, and three oxygen (O) atoms on both sides. Therefore, the equation is already balanced.

Summary:

The balanced chemical equation for the reaction between calcium oxide (CaO) and carbon dioxide (CO2) is CaO + CO2 → CaCO3. This synthesis reaction results in the formation of calcium carbonate (CaCO3). It is important to balance the equation to ensure that the number of atoms of each element is the same on both sides.