How to remove excess potassium permanganate from a potassium permanganate solution using hydrogen peroxide?
Thread Content
I was doing an experiment today, aiming to use hydrogen peroxide to remove excess potassium permanganate from a solution of potassium permanganate. When hydrogen peroxide was added at 100 degrees Celsius, a large number of bubbles were produced; even after adding more of it, the bubbles continued to form in large quantities. What should I do? (I don’t want to use other reducing agents, as I’m afraid they will introduce new impurities that will make separation difficult in the next step.)
It can’t be added at such high temperatures; room temperature should be sufficient. Additionally, the reaction between hydrogen peroxide and potassium permanganate requires the addition of sulfuric acid, which would introduce new impurities. It is recommended that the original poster use another method
You want to use hydrogen peroxide to remove excess potassium permanganate, right? It’s not easy to control that process; it would be better to prepare a separate potassium permanganate solution.
Hydrogen peroxide decomposes at 100 degrees; you can cool the solution, add more hydrogen peroxide, and then heat it again to remove any excess hydrogen peroxide after the reaction is complete.
Adding it at room temperature until fading, and then removing it at high temperature should be the correct approach. Agree with what was said above.
I remember that this reaction generally occurs around 70 degrees, and 3N sulfuric acid also needs to be added; give it a try