Why does the milkiness disappear on passing excess of carbon dioxide to lime water ?

Explanation

To understand why the milkiness disappears when excess carbon dioxide is passed into lime water, we can break down the process into a few clear steps:

### Step-by-Step Solution:

1. **Understanding Lime Water**: Lime water is a solution of calcium hydroxide (Ca(OH)₂) in water. It is clear and colorless.

2. **Reaction with Carbon Dioxide**: When carbon dioxide (CO₂) is bubbled through lime water, a chemical reaction occurs. The carbon dioxide reacts with calcium hydroxide to form calcium carbonate (CaCO₃):
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