Why temporary hardness of water is called so?

Explanation

### Step-by-Step Solution:

1. **Understanding Water Hardness**: Water hardness is classified into two main types: temporary hardness and permanent hardness. Temporary hardness is primarily caused by the presence of bicarbonate salts of calcium and magnesium.

2. **Components of Temporary Hardness**: The salts responsible for temporary hardness are calcium bicarbonate (Ca(HCO₃)₂) and magnesium bicarbonate (Mg(HCO₃)₂). These salts dissolve in water and contribute to the hardness.

3. **Removal of Temporary Hardness**: The key characteristic of temporary hardness is that it can be removed by boiling the water. When water containing calcium and magnesium bicarbonates is boiled, these bicarbonates decompose to form insoluble carbonates (calcium carbonate and magnesium carbonate), which precipitate out of the solution.

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