The chemical equation CaO + 2HCl -> CaCl2 + H2O

1. Detailed information about the equation CaO + 2HCl -> CaCl₂ + H₂O:

This equation describes the reaction process between calcium oxide (CaO) and hydrochloric acid (HCl) to form calcium chloride (CaCl₂) and water (H₂O).

2. Reaction conditions:

This reaction occurs easily at room temperature and standard pressure.

3. Reaction process:

Calcium oxide (CaO) reacts with hydrochloric acid (HCl) to form calcium chloride (CaCl₂) and water (H₂O). It is an ion exchange reaction, where the calcium ion from calcium oxide exchanges places with the hydrogen ion in hydrochloric acid.

4. Phenomena that occur:

When CaO reacts with HCl, smoke rises and heat is generated. The boiling, smoke and heat are due to the dissolution of CaO in HCl and the ion exchange process between CaO and HCl. The products of the reaction are a solution of calcium chloride and water.