The balanced chemical equation for the decomposition of water is:

2 H₂O(l) → 2 H₂(g) + O₂(g)

Here's what it means:

* 2 H₂O(l): Two molecules of liquid water (H₂O) are the reactants.

* 2 H₂(g): Two molecules of gaseous hydrogen (H₂) are produced.

* O₂(g): One molecule of gaseous oxygen (O₂) is produced.

Important Considerations:

* Energy Input: This reaction requires energy input, typically in the form of electricity (electrolysis) or heat.

* Conditions: Decomposition of water usually occurs at high temperatures or with the application of an electric current.