An aqueous solution of sodium carbonate gives alkaline tests . Why ?

Explanation

### Step-by-Step Solution:

1. **Understanding Sodium Carbonate:**
Sodium carbonate (Na2CO3) is a salt that, when dissolved in water, dissociates into sodium ions (Na⁺) and carbonate ions (CO3²⁻).

2. **Reaction with Water:**
When sodium carbonate is added to water, it undergoes a reaction where it can interact with water molecules. The carbonate ion (CO3²⁻) can react with water to form bicarbonate (HCO3⁻) and hydroxide ions (OH⁻):
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