* Calcium chloride (CaCl₂) is a salt. It's already in its most stable ionic form.
* Hydrochloric acid (HCl) is a strong acid. It completely dissociates into H⁺ and Cl⁻ ions in solution.
The reaction is essentially a double displacement reaction, but no new precipitate or gas is formed. Instead, the ions simply remain in solution:
CaCl₂ (aq) + 2HCl (aq) → Ca²⁺ (aq) + 2Cl⁻ (aq) + 2H⁺ (aq) + 2Cl⁻ (aq)
Essentially, you end up with a solution containing calcium ions (Ca²⁺), hydrogen ions (H⁺), and chloride ions (Cl⁻).
