Salts are ionic compounds . Name the salt that forms when calcium oxide reacts withhydrochloric acid . Write which ions it contains ? [2

When calcium oxide (CaO) reacts with hydrochloric acid (HCl), it forms calcium chloride (CaCl₂) as the salt. The reaction can be represented as follows:

$\text{CaO} + 2\text{HCl} \rightarrow \text{CaCl}_2 + \text{H}_2\text{O}$

Ions in Calcium Chloride

Calcium chloride (CaCl₂) contains the following ions:

1. Calcium ions ($\text{Ca}^{2+}$) - These are positive ions that come from the calcium oxide.
2. Chloride ions ($\text{Cl}^-$) - These negative ions come from the hydrochloric acid. Since there are two chloride ions, the formula indicates $\text{CaCl}_2$.

In summary, when calcium oxide reacts with hydrochloric acid, it produces calcium chloride, which dissociates into calcium ions and chloride ions in solution.