Write the reaction involving : Blue solution of Copper sulphate.

Explanation

To write the reaction involving the blue solution of copper sulfate, we can follow these steps:

### Step 1: Identify the reactants
The blue solution of copper sulfate is represented by its chemical formula, which is \( \text{CuSO}_4 \cdot 5\text{H}_2\text{O} \) (hydrated copper sulfate). When we pass hydrogen sulfide gas (\( \text{H}_2\text{S} \)) through this solution, we are introducing another reactant.

**Hint:** Remember that copper sulfate is a blue solution and is often hydrated.

### Step 2: Understand the type of reaction
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