Calcium nitrate water is formed by the reaction of a strong acid and a strong base:

* Acid: Nitric acid (HNO₃)

* Base: Calcium hydroxide (Ca(OH)₂)

Here's the balanced chemical equation for the reaction:

2HNO₃(aq) + Ca(OH)₂(aq) → Ca(NO₃)₂(aq) + 2H₂O(l)

This is a neutralization reaction where the acid and base react to form a salt (calcium nitrate) and water.