Here's the chemical reaction:
MgO (s) + CO₂ (g) → MgCO₃ (s)
* Magnesium oxide (MgO) is a basic oxide.
* Carbon dioxide (CO₂) is an acidic oxide.
* When these two react, they neutralize each other, forming the salt magnesium carbonate (MgCO₃).
The reaction is also an example of a neutralization reaction, where an acid and a base react to form salt and water. In this case, water isn't directly formed, but it is present in the solution.