Why permanganate titrations in presence of hydrochloric acid are unsatisfactory ?

Explanation

### Step-by-Step Solution

1. **Understanding the Role of Acid in Permanganate Titrations**:
- In permanganate titrations, an acid is required to provide H⁺ ions, which facilitate the redox reaction between permanganate ions (KMnO₄) and the reducing agent, such as oxalic acid (H₂C₂O₄).

2. **Identifying the Problem with Hydrochloric Acid (HCl)**:
- When hydrochloric acid (HCl) is used, it is a strong acid that can react with permanganate ions. This reaction leads to the oxidation of chloride ions (Cl⁻) from HCl instead of the intended reaction with the reducing agent.

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