`BaCO_(3)darr+2HCl to BaCl_(2)+CO_(2)uarr+H_(2)O`

Options

A. For precipitate formation formation reaction
B. For precipitate dissolution reaction
C. For precipitate exchange reaction
D. For no reaction

Answer

To solve the given reaction and identify its type, we can follow these steps:

### Step 1: Write down the given reaction
The reaction provided is:
\[ \text{BaCO}_3 (s) + 2 \text{HCl} (aq) \rightarrow \text{BaCl}_2 (aq) + \text{CO}_2 (g) + \text{H}_2O (l) \]

### Step 2: Identify the reactants and products
- **Reactants**: Barium carbonate (BaCO₃) and hydrochloric acid (HCl).
- **Products**: Barium chloride (BaCl₂), carbon dioxide (CO₂), and water (H₂O).

### Step 3: Analyze the state of each compound
- **BaCO₃** is a solid (indicated by the downward arrow).
- **HCl** is in aqueous solution (aq).
- **BaCl₂** is also in aqueous solution (aq).
- **CO₂** is a gas (indicated by the upward arrow).
- **H₂O** is a liquid (l).

### Step 4: Determine the type of reaction
In this reaction, barium carbonate (a solid precipitate) reacts with hydrochloric acid to produce barium chloride (which is soluble in water), carbon dioxide (a gas), and water. The solid barium carbonate dissolves in the acid, leading to the formation of soluble barium chloride and the release of gas (CO₂).

### Step 5: Classify the reaction
Since barium carbonate (the precipitate) is dissolving in hydrochloric acid and producing soluble products along with gas, this reaction can be classified as a **precipitate dissolution reaction**.

### Conclusion
The correct classification of the reaction is:
**Option 2: Precipitate dissolution reaction.**

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