Solution of `SO_2` in water in known as _____.

Answer

To solve the question, "Solution of SO₂ in water is known as _____," we can follow these steps:

### Step 1: Identify the Compound
We start by recognizing the compound in question, which is sulfur dioxide (SO₂).

**Hint:** Remember that SO₂ is a common gas that can dissolve in water.

### Step 2: Understand the Reaction
When sulfur dioxide (SO₂) is dissolved in water (H₂O), it undergoes a chemical reaction. This reaction leads to the formation of a new compound.

**Hint:** Think about what happens when gases dissolve in water; they often react to form acids or bases.

### Step 3: Write the Reaction
The dissolution of SO₂ in water can be represented by the following chemical equation:
\[ \text{SO}_2 + \text{H}_2\text{O} \rightleftharpoons \text{H}_2\text{SO}_3 \]

Here, sulfur dioxide reacts with water to form sulfurous acid (H₂SO₃).

**Hint:** Look for the products of the reaction when a non-metal oxide reacts with water.

### Step 4: Identify the Product
The product formed from the reaction is sulfurous acid (H₂SO₃). This compound is characterized by its acidic properties.

**Hint:** Recall that many non-metal oxides react with water to form acids.

### Step 5: Conclusion
Thus, the solution of SO₂ in water is known as sulfurous acid (H₂SO₃).

**Final Answer:** The solution of SO₂ in water is known as **sulfurous acid**.

### Summary of Steps:
1. Identify the compound (SO₂).
2. Understand the reaction with water.
3. Write the chemical reaction.
4. Identify the product formed (H₂SO₃).
5. Conclude with the name of the solution.