SO₂(g) + H₂O(l) ⇌ H₂SO₃(aq)
This reaction produces sulfurous acid (H₂SO₃), which is a weak acid. The reaction is reversible, meaning that sulfurous acid can also decompose back into sulfur dioxide and water.
Here's a breakdown of the equation:
* SO₂(g): Sulfur dioxide, in its gaseous state.
* H₂O(l): Water, in its liquid state.
* ⇌: Indicates that the reaction is reversible.
* H₂SO₃(aq): Sulfurous acid, dissolved in water (aqueous solution).
Important Note: This reaction is not a simple combination reaction. The sulfur dioxide dissolves in water and then reacts with the water molecules to form sulfurous acid.
