Write chemical reactions taking place in the extraction of Aluminium from Bauxite ore .

Explanation

To extract aluminum from bauxite ore (Al2O3·2H2O), several chemical reactions take place through different processes. The most common methods are Bayer's process, Hall's process, and Sirkbeck's method. Below are the detailed chemical reactions involved in each method.

### 1. Bayer's Process

**Step 1:** Dissolution of Bauxite in Sodium Hydroxide
- **Reaction:**
\[
\text{Al}_2\text{O}_3 \cdot 2\text{H}_2\text{O} + 2\text{NaOH} \rightarrow 2\text{NaAlO}_2 + 2\text{H}_2\text{O}
...