The reaction between sodium oxide (Na₂O) and sulfur dioxide (SO₂) produces sodium sulfite (Na₂SO₃). Here's the balanced chemical equation:

Na₂O + SO₂ → Na₂SO₃

Here's a breakdown:

* Sodium oxide (Na₂O): A basic oxide, meaning it reacts with acids.

* Sulfur dioxide (SO₂): An acidic oxide, meaning it reacts with bases.

* Sodium sulfite (Na₂SO₃): A salt formed by the neutralization reaction between the base and acid.

This reaction is an example of a neutralization reaction. The basic oxide (Na₂O) reacts with the acidic oxide (SO₂) to form a salt (Na₂SO₃).