`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 analyze the reaction between barium chromate (BaCrO₄) and acetic acid (CH₃COOH) and determine why it results in "no reaction," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants in this case are barium chromate (BaCrO₄) and acetic acid (CH₃COOH). BaCrO₄ is a yellow precipitate that is insoluble in water.

2. **Understand the Nature of the Reactants**:
- **Barium Chromate (BaCrO₄)**: This compound is a salt that forms a solid precipitate when mixed with water. It is known for its low solubility in water.
- **Acetic Acid (CH₃COOH)**: This is a weak acid that can dissociate in water to form acetate ions (CH₃COO⁻) and hydrogen ions (H⁺).

3. **Consider Possible Reactions**: When mixing BaCrO₄ with CH₃COOH, we might expect some sort of reaction, such as:
- Precipitate formation (which is not applicable here since BaCrO₄ is already a precipitate).
- Dissolution of the precipitate (which is also unlikely since BaCrO₄ is not soluble in acetic acid).
- Exchange reactions (which would require both reactants to have the potential to form new products).

4. **Analyze the Reaction Conditions**: Since BaCrO₄ is already a precipitate and is not soluble in acetic acid, there is no driving force for a reaction to occur. The acetic acid does not provide any ions that would react with BaCrO₄ to form new products.

5. **Conclusion**: Since neither a new precipitate is formed, nor does the existing precipitate dissolve, and no exchange occurs, we conclude that there is no reaction taking place between BaCrO₄ and excess CH₃COOH.

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

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