Titration
In redox titration of oxalic acid with KMnO₄, KMnO₄ acts as:
Select the correct option:
Solution
Oxidizing agent and self-indicator
In the titration of Oxalic acid (H2C2O4) with Potassium permanganate (KMnO4) in acidic medium (H2SO4):
- Redox Action: KMnO4 is a strong oxidizing agent. It oxidizes oxalic acid to CO2 while being reduced to colorless Mn2+.
- Self-Indicator: No external indicator is needed. The deep purple color of KMnO4 disappears as it reacts. At the equivalence point, the very first drop of excess KMnO4 imparts a persistent light pink color to the solution, signaling the end point.
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More titration Practice Questions
For titration of a strong acid with a strong base, the most suitable indicator is:
For titration of a strong acid with a strong base, the most suitable indicator is:
If a burette reading is consistently 0.10 mL higher due to parallax, the primary effect on calculate...
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KMnO4 acts as self-indicator because:
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At titration endpoint, indicator color change signifies:
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About This Question
- Subject
- chemistry
- Chapter
- principles related to practical chemistry
- Topic
- titration
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Oxidizing agent and self-indicator
In the titration of Oxalic acid (H2C2O4) with Potassium permanganate (KMnO4) in acidic medium (H2SO4):
- Redox Action: KMnO4 is a strong oxidizing agent. It oxidizes oxalic acid to CO2 while being reduced to colorless Mn2+.
- Self-Indicator: No external indicator is needed. The deep purple color of KMnO4 disappears as it reacts. At the equivalence point, the very first drop of excess KMnO4 imparts a persistent light pink color to the solution, signaling the end point.
This easy difficulty chemistry question is from the chapter principles related to practical chemistry, covering the topic of titration. It appeared in the 2025 exam.
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