`SO_(2)` turns into which acid when mixed with water

Options

A. `H_(2)SO_(2)`
B. `H_(2)SO_(3)`
C. `H_(2)SO_(4)`
D. None of the above

Answer

To determine which acid sulfur dioxide (SO₂) turns into when mixed with water, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: We start with sulfur dioxide (SO₂) and water (H₂O).

2. **Write the Reaction**: When sulfur dioxide is mixed with water, a chemical reaction occurs:
\[ SO_2 + H_2O \rightarrow H_2SO_3 \]

3. **Identify the Product**: The product formed from this reaction is sulfurous acid (H₂SO₃).

4. **Understand the Nature of the Acid**: Sulfurous acid (H₂SO₃) is classified as a dibasic acid, meaning it can donate two protons (H⁺ ions) in solution.

5. **Conclusion**: Therefore, when sulfur dioxide is mixed with water, it forms sulfurous acid (H₂SO₃).

### Final Answer:
Sulfur dioxide (SO₂) turns into sulfurous acid (H₂SO₃) when mixed with water.

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