Why does lime water turns milky on bubbling `CO_(2)` gas through it?

Explanation

### Step-by-Step Solution

1. **Understanding Lime Water**: Lime water is a dilute solution of calcium hydroxide (Ca(OH)₂). It is commonly used to test for the presence of carbon dioxide (CO₂) gas.

2. **Bubbling CO₂ through Lime Water**: When carbon dioxide gas is bubbled through lime water, a chemical reaction occurs. The CO₂ reacts with the calcium hydroxide in the lime water.

3. **Formation of Calcium Carbonate**: The reaction can be represented by the following equation:
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