`Ca(OH)_(2)+2FH to CaF_(2)darr+2H_(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 question regarding the reaction \( \text{Ca(OH)}_2 + 2 \text{HF} \rightarrow \text{CaF}_2 + 2 \text{H}_2\text{O} \), we will analyze the type of reaction that is taking place.

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- The reactants are calcium hydroxide (\( \text{Ca(OH)}_2 \)) and hydrogen fluoride (\( \text{HF} \)).
- The products are calcium fluoride (\( \text{CaF}_2 \)) and water (\( \text{H}_2\text{O} \)).

2. **Determine the Nature of the Reaction**:
- In this reaction, \( \text{Ca(OH)}_2 \) reacts with \( \text{HF} \) to form \( \text{CaF}_2 \) and \( \text{H}_2\text{O} \).
- Calcium fluoride (\( \text{CaF}_2 \)) is a solid that precipitates out of the solution.

3. **Classify the Reaction**:
- Since a solid product (precipitate) is formed from the reaction of two aqueous reactants, this is classified as a **precipitate formation reaction**.

4. **Conclusion**:
- The correct classification of the reaction \( \text{Ca(OH)}_2 + 2 \text{HF} \rightarrow \text{CaF}_2 + 2 \text{H}_2\text{O} \) is a **precipitate formation reaction**.

### Final Answer:
The reaction is classified as a **precipitate formation reaction**.

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