The reaction you're describing is the decomposition of potassium hydrogen carbonate (KHCO₃). Here's the balanced chemical equation:

2KHCO₃(s) → K₂CO₃(s) + H₂O(l) + CO₂(g)

Here's the breakdown:

* Reactant: Potassium hydrogen carbonate (KHCO₃) - also known as potassium bicarbonate

* Products:

* Potassium carbonate (K₂CO₃)

* Water (H₂O)

* Carbon dioxide (CO₂)

Important Note: This reaction is usually carried out by heating the potassium hydrogen carbonate.

Let me know if you have any other questions!