`CaCO_(3) + ………to CaCl_(2) + H_(2)O + `……………

Answer

To complete the reaction of calcium carbonate (CaCO₃) with hydrochloric acid (HCl), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
The reactant given is calcium carbonate (CaCO₃). We need to find the other reactant that will react with it to produce the products mentioned.

**Hint**: Think about common acids that react with carbonates.

2. **Determine the Other Reactant**:
Calcium carbonate typically reacts with hydrochloric acid (HCl).

**Hint**: Consider the properties of acids and how they interact with carbonates.

3. **Write the Chemical Equation**:
The reaction can be written as:
\[ \text{CaCO}_3 + \text{HCl} \rightarrow \text{CaCl}_2 + \text{H}_2\text{O} + \text{CO}_2 \]

**Hint**: Remember that the products of a carbonate reacting with an acid typically include a salt, water, and carbon dioxide.

4. **Balance the Chemical Equation**:
- On the left side, we have:
- 1 Calcium (Ca)
- 1 Carbon (C)
- 3 Oxygens (O)
- 1 Hydrogen (H)
- 1 Chlorine (Cl)
- On the right side, we have:
- 1 Calcium (Ca)
- 1 Carbon (C)
- 3 Oxygens (O) (from H₂O and CO₂)
- 2 Hydrogens (H) (from H₂O)
- 2 Chlorines (Cl) (from CaCl₂)

To balance the equation, we need to adjust the number of HCl:
\[ \text{CaCO}_3 + 2\text{HCl} \rightarrow \text{CaCl}_2 + \text{H}_2\text{O} + \text{CO}_2 \]

**Hint**: Check each element on both sides to ensure they are equal.

5. **Final Products**:
The final products of the reaction are calcium chloride (CaCl₂), water (H₂O), and carbon dioxide (CO₂).

**Hint**: Think about the physical properties of the products, such as the gas released.

### Final Answer:
The complete reaction is:
\[ \text{CaCO}_3 + 2\text{HCl} \rightarrow \text{CaCl}_2 + \text{H}_2\text{O} + \text{CO}_2 \]