`BaSO_(4)darr+"dil. HCl (excess)" to `No reaction

Options

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

Answer

To analyze the reaction of barium sulfate (BaSO₄) with dilute hydrochloric acid (HCl) and determine why it results in "no reaction," we can break it down step by step.

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- The reactant is barium sulfate (BaSO₄), which is a solid precipitate.
- The other reactant is dilute hydrochloric acid (HCl).

2. **Understand the Nature of BaSO₄**:
- Barium sulfate is known to be insoluble in water and in dilute hydrochloric acid. This means that when it is mixed with HCl, it does not dissolve.

3. **Consider the Reaction**:
- When BaSO₄ is mixed with dilute HCl, one might expect a reaction to occur, potentially forming barium chloride (BaCl₂) and sulfuric acid (H₂SO₄). However, due to the insolubility of BaSO₄, no such reaction occurs.

4. **Conclusion**:
- Since BaSO₄ does not dissolve in dilute HCl, we conclude that there is no chemical reaction taking place. Therefore, the reaction can be classified as "no reaction."

5. **Select the Correct Option**:
- Based on the analysis, the correct option is "no reaction," which corresponds to part D of the options provided.

### Summary:
The reaction of BaSO₄ with dilute HCl results in "no reaction" because barium sulfate is insoluble in hydrochloric acid, meaning it does not dissolve or react.

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