`Ca(OH)_(2)+SO_(2) to CaSO_(3)darr+H_(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 reaction \( \text{Ca(OH)}_2 + \text{SO}_2 \rightarrow \text{CaSO}_3 + \text{H}_2\text{O} \), we will analyze the components and the type of reaction taking place step by step.

### Step 1: Identify the Reactants
The reactants in the equation are:
- Calcium hydroxide (\( \text{Ca(OH)}_2 \))
- Sulfur dioxide (\( \text{SO}_2 \))

### Step 2: Identify the Products
The products of the reaction are:
- Calcium sulfite (\( \text{CaSO}_3 \))
- Water (\( \text{H}_2\text{O} \))

### Step 3: Determine the Type of Reaction
This reaction involves the combination of calcium hydroxide and sulfur dioxide to form calcium sulfite and water. We need to determine if this is a precipitation reaction.

1. **Precipitate Formation**: A precipitate is formed when two soluble reactants combine to form an insoluble product. In this case, calcium sulfite (\( \text{CaSO}_3 \)) is typically insoluble in water, indicating that it will precipitate out of the solution.

### Step 4: Write the Balanced Reaction
The balanced reaction is already provided:
\[ \text{Ca(OH)}_2 + \text{SO}_2 \rightarrow \text{CaSO}_3 \downarrow + \text{H}_2\text{O} \]
The downward arrow indicates that calcium sulfite is a precipitate.

### Step 5: Conclusion
Since a precipitate is formed in this reaction, we can conclude that this is a **precipitate formation reaction**.

### Final Answer
The correct classification for the reaction \( \text{Ca(OH)}_2 + \text{SO}_2 \rightarrow \text{CaSO}_3 + \text{H}_2\text{O} \) is **precipitate formation reaction**.

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