Washing soda is

Options

A. `Na_(2)CO_(3) . 7H_(2)O`
B. `Na_(2)CO_(3) . 10H_(2)O`
C. `Na_(2)CO_(3) . 3 H_(2)O`
D. `Na_(2)CO_(3)`

Answer

To solve the question "Washing soda is," we need to identify what washing soda is, including its chemical formula and name.

### Step-by-Step Solution:

1. **Identify the Chemical Formula**:
- Washing soda is commonly known as sodium carbonate. The chemical formula for washing soda is Na₂CO₃.

2. **Determine the Hydration**:
- Washing soda is often found in a hydrated form. The hydrated form of sodium carbonate is sodium carbonate decahydrate, which has 10 water molecules associated with it.

3. **Write the Complete Formula**:
- The complete chemical formula for washing soda in its hydrated form is Na₂CO₃·10H₂O. This indicates that for every formula unit of sodium carbonate, there are 10 molecules of water.

4. **Provide the Chemical Name**:
- The chemical name for Na₂CO₃·10H₂O is Sodium Carbonate Decahydrate.

### Final Answer:
Washing soda is Sodium Carbonate Decahydrate, with the chemical formula Na₂CO₃·10H₂O.

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