1. Definition of CO₂:

Carbon Dioxide, commonly known as CO₂, is a colorless, odorless gas with a slight sour taste. In English, it is called “Carbon Dioxide”. The structure of a CO₂ molecule consists of 1 carbon atom and 2 oxygen atoms. The atomic weight of carbon is 12, the atomic weight of oxygen is 16, hence, the atomic weight of CO₂ is approximately 44. CO₂ does not form ions under normal conditions.

2. Properties of CO₂:

2.1 Physical properties: CO₂ is a colorless, odorless gas and does not have a specific PH because it is neither an acid nor a base.

2.2 Chemical properties: CO₂ does not burn and does not support combustion. It can react with water to form carbonic acid, a weak acid.

3. Common chemical equations:

CO₂ reacts with alkali metals to form carbonate and hydrogen.

Example: 2Na + CO₂ -> Na₂CO₃ + H₂

CO₂ reacts with strong acid to form salt and water.

Example: 2HCl + CO₂ -> CaCl₂ + H₂O

CO₂ does not react with non-metals and salts under normal conditions.

4. Synthesis of CO₂:

4.1 The most common way to synthesize CO₂ in the laboratory is by completely burning a carbon-containing substance.

Example: C + O₂ -> CO₂

4.2 In industry, CO₂ is synthesized from the combustion of fossil fuels such as coal and oil.

1. Definition of CO₂:

1.1 Names:

1.1.1 Common name: Carbonic gas, carbon dioxide gas

1.1.2 English name: Carbon dioxide

1.2 Atomic structure: Consists of 1 Carbon atom and 2 Oxygen atoms.

1.3 Atomic mass: 44.01 g/mol

1.3.1 Molecular structure: CO₂ is a linear molecule, with Carbon in the middle and 2 Oxygen atoms at both ends.

1.4 Ion structure: Doesn’t form ions under normal conditions.

2. Properties of CO₂:

2.1 Physical properties:

State: Gas

Color: Colorless

Odor: Odorless

PH level: Not applicable as CO₂ is a gas

2.2 Chemical properties: It’s a mild oxidant, insoluble in water, dissolves in water to form soda water.

3. Common chemical reactions:

Reaction with metals: CO₂ doesn’t react directly with metals.

Reaction with acids: CO₂ doesn’t react directly with acids.

Reaction with non-metals: CO₂ + C -> 2CO(reactionwithCarbon)

Reaction with salts: CO₂ doesn’t react directly with salts.

4. Preparation of CO₂:

4.1 Laboratory preparation: CO₂ can be prepared from the reaction of acid and carbonate salt: H₂SO₄ + Na₂CO₃ -> Na₂SO₄ + H₂O + CO₂

4.2 Industrial preparation: CO₂ is usually prepared from the combustion of fossil fuels (mainly coal and petroleum).