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Determination of Concentration of KMnO4 Solution using Ferrous Ammonium Sulphate Video Lecture - Class 12
FAQs on Determination of Concentration of KMnO4 Solution using Ferrous Ammonium Sulphate Video Lecture - Class 12
| 1. How can I determine the concentration of a KMnO4 solution using ferrous ammonium sulphate? |  |
Ans. To determine the concentration of a KMnO4 solution using ferrous ammonium sulphate, you can perform a redox titration. In this titration, a known volume of the KMnO4 solution is added to a flask containing a known excess of ferrous ammonium sulphate. The reaction between KMnO4 and Fe(NH4)2(SO4)2 is a redox reaction, and the endpoint of the titration is reached when all the Fe2+ ions have reacted with KMnO4. The volume of KMnO4 solution used can then be used to calculate its concentration.
| 2. What is the reaction between KMnO4 and ferrous ammonium sulphate? | |
Ans. The reaction between KMnO4 and ferrous ammonium sulphate is a redox reaction. In an acidic medium, KMnO4 acts as an oxidizing agent, while ferrous ammonium sulphate (Fe(NH4)2(SO4)2) acts as a reducing agent. The balanced chemical equation for the reaction is:
5Fe(NH4)2(SO4)2 + 8H2SO4 + 2KMnO4 → K2SO4 + 5Fe2(SO4)3 + 2MnSO4 + 8H2O + 10NH4HSO4
| 3. What is the purpose of using ferrous ammonium sulphate in the determination of KMnO4 concentration? | |
Ans. Ferrous ammonium sulphate is used in the determination of KMnO4 concentration because it acts as a reducing agent. In the redox titration, the Fe2+ ions in the ferrous ammonium sulphate are oxidized by the KMnO4 solution. By measuring the volume of KMnO4 solution required to react with all the Fe2+ ions, the concentration of the KMnO4 solution can be determined.
| 4. How do you calculate the concentration of the KMnO4 solution based on the titration results? | |
Ans. To calculate the concentration of the KMnO4 solution, you need to know the volume of the KMnO4 solution used in the titration and the molar ratio between KMnO4 and Fe2+. The balanced equation from the reaction in question 2 shows that 2 moles of KMnO4 react with 5 moles of Fe2+. Therefore, you can use the equation:
Concentration of KMnO4 (in mol/L) = (5 * Molarity of Fe(NH4)2(SO4)2 * Volume of KMnO4 used) / Volume of Fe(NH4)2(SO4)2 used
| 5. What precautions should be taken during the determination of KMnO4 concentration using ferrous ammonium sulphate? | |
Ans. Some precautions to consider during the determination of KMnO4 concentration using ferrous ammonium sulphate include:
- Ensure all glassware is clean and free of impurities.
- Use standardized solutions and equipment to ensure accurate results.
- Handle KMnO4 solution with care as it is toxic and can stain.
- Perform the titration in a well-ventilated area to avoid inhalation of any fumes.
- Use appropriate safety measures, such as wearing gloves and goggles, when working with chemicals.
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Dec 02, 2024 Last updated |
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