Which is an ore potassium?

Options

A. Carnalite
B. Cryolite
C. Dolomite
D. Bauxite

Explanation

To determine which is an ore of potassium, we can follow these steps:

### Step-by-Step Solution:

1. **Define Ore**: An ore is a naturally occurring solid material from which a metal or valuable mineral can be extracted.

2. **List the Given Options**: The options provided are:
- Carnalite
- Chirolite
- Dolomite
- Bauxite

3. **Analyze Each Option**:
- **Carnalite**: The chemical formula is KCl·MgCl₂·6H₂O. This compound contains potassium (K), indicating that it is an ore of potassium.
- **Chirolite**: The chemical formula is Na₃AlF₆. This does not contain potassium.
- **Dolomite**: The chemical formula is CaMg(CO₃)₂. This also does not contain potassium.
- **Bauxite**: The chemical formula is Al₂O₃·2H₂O. This is primarily an ore of aluminum and does not contain potassium.

4. **Conclusion**: Among the given options, only Carnalite contains potassium, making it the ore of potassium.

5. **Final Answer**: The ore of potassium is **Carnalite**.