`BaCrO_(4)darr+CH_(3)COOH(excess)to`No reaction

Options

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

Answer

To solve the question regarding the reaction between BaCrO₄ and CH₃COOH, we will analyze the components and their properties step by step.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants are Barium Chromate (BaCrO₄) and Acetic Acid (CH₃COOH).
- BaCrO₄ is known to be a yellow precipitate that is largely insoluble in water.

2. **Understand the Nature of BaCrO₄**:
- BaCrO₄ is a sparingly soluble salt, which means it does not dissolve significantly in water. Its solubility product (Ksp) is very low, indicating that it remains mostly in solid form when mixed with water.

3. **Analyze the Role of Acetic Acid**:
- Acetic acid (CH₃COOH) is a weak acid that can dissociate in water to form acetate ions (CH₃COO⁻) and hydrogen ions (H⁺).
- While acetic acid can react with some metal ions to form soluble complexes, it does not have the ability to displace the chromate ion (CrO₄²⁻) from BaCrO₄.

4. **Consider Possible Reactions**:
- The options provided include:
1. Precipitate formation reaction
2. Precipitate dissolution reaction
3. Precipitate exchange reaction
4. No reaction
- Since BaCrO₄ is insoluble and acetic acid does not react with the chromate ion to form a soluble compound, we can conclude that there will be no reaction.

5. **Conclusion**:
- Based on the properties of the reactants and their interactions, the correct answer is that there is **no reaction** between BaCrO₄ and CH₃COOH in excess.

### Final Answer:
- The reaction between BaCrO₄ and CH₃COOH results in **no reaction**.