Addition of `Cl_(2)` to KI solution gives it a brown colour but excess of `Cl_(2)`turns it colourless. Explain.

Explanation

To explain the phenomenon of the addition of Cl₂ to KI solution, which initially gives a brown color but turns colorless upon the addition of excess Cl₂, we can break down the process into a series of steps:

### Step-by-Step Solution:

1. **Understanding the Reactants**:
- Potassium iodide (KI) dissociates in solution to give potassium ions (K⁺) and iodide ions (I⁻).
- Chlorine gas (Cl₂) is a strong oxidizing agent.

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