`HgS` is soluble in aqua regia forming `HgCl_(2)`. What happens if Cu turnings are added to `HgCl_(2)`?

Explanation

To solve the question regarding the reaction between `HgCl2` and copper turnings, we can follow these steps:

### Step 1: Understand the Reactants
We start with mercuric chloride (`HgCl2`), which is formed when `HgS` is dissolved in aqua regia. The other reactant is copper (Cu) turnings.

### Step 2: Write the Reaction
When copper is added to mercuric chloride, a chemical reaction occurs. The balanced chemical equation for this reaction is:
\[ \text{HgCl}_2 + \text{Cu} \rightarrow \text{CuCl}_2 + \text{Hg} \]
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