Write the chemical reactions involved in the extraction of metallic silver from argentite.

Explanation

To extract metallic silver from argentite (Ag2S), the cyanide process is employed. Here are the step-by-step chemical reactions involved in this extraction process:

### Step 1: Treatment of Argentite with Sodium Cyanide
The first step involves treating the argentite ore (Ag2S) with sodium cyanide (NaCN). This reaction leads to the formation of a soluble complex.

**Chemical Reaction:**
\[
\text{Ag}_2\text{S} + 4 \text{NaCN} \rightarrow 2 \text{Na}[\text{Ag(CN)}_2] + \text{Na}_2\text{S}
...