What is the formula for carbonated water?

Carbonated water is not a single pure compound, so it does not have one fixed formula. It is best described as:

H₂O + CO₂ (dissolved)

Chemical reaction involved:

CO₂ + H₂O ⇌ H₂CO₃

Explanation:

• Carbon dioxide dissolves in water
• A small portion forms carbonic acid (H₂CO₃)
• Most CO₂ remains dissolved gas

So, commonly used representation:

• H₂CO₃ (carbonic acid) → for simplicity
• But technically → CO₂ dissolved in H₂O

Key Takeaway:

Carbonated water is a mixture of water and dissolved CO₂, with partial formation of carbonic acid (H₂CO₃).