Titration

Question

In redox titration of oxalic acid with KMnO₄, KMnO₄ acts as:

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In the titration of **Oxalic acid ($H_2C_2O_4$)** with **Potassium permanganate ($KMnO_4$)** in acidic medium ($H_2SO_4$):
1. **Redox Action**: $KMnO_4$ is a strong **oxidizing agent**. It oxidizes oxalic acid to $CO_2$ while being reduced to colorless $Mn^{2+}$.
2. **Self-Indicator**: No external indicator is needed. The deep purple color of $KMnO_4$ disappears as it reacts. At the equivalence point, the very first drop of excess $KMnO_4$ imparts a **persistent light pink color** to the solution, signaling the end point.

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