`Ca(OH)_(2)+CO_(2)toCaCO_(3)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 analyze the given reaction \( \text{Ca(OH)}_2 + \text{CO}_2 \rightarrow \text{CaCO}_3 + 2\text{H}_2\text{O} \) and determine the type of reaction it represents, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- The reactants are calcium hydroxide (\( \text{Ca(OH)}_2 \)) and carbon dioxide (\( \text{CO}_2 \)).
- The products are calcium carbonate (\( \text{CaCO}_3 \)) and water (\( \text{H}_2\text{O} \)).

2. **Determine the Nature of the Reaction**:
- In this reaction, calcium hydroxide reacts with carbon dioxide to form calcium carbonate and water.
- Calcium carbonate (\( \text{CaCO}_3 \)) is a solid that precipitates out of the solution.

3. **Classify the Reaction**:
- Since a solid (precipitate) is formed from the reaction of two aqueous solutions, this indicates that the reaction is a **precipitate formation reaction**.
- The formation of a solid from the reactants is a key characteristic of this type of reaction.

4. **Conclusion**:
- Therefore, the correct classification of the reaction \( \text{Ca(OH)}_2 + \text{CO}_2 \rightarrow \text{CaCO}_3 + 2\text{H}_2\text{O} \) is a **precipitate formation reaction**.

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

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