Question

How will you know if the KMnO4 is in excess instead of the hydrogen peroxide being in excess?

Answer 1

• Potassium Permanganate (KMnO₄) is sprinkled onto a burning solution of hydrogen peroxide and ethanol.

• Oxygen is evolved in the reaction and it increases the rate of burning, a series of loud bangs is heard.

• Potassium permanganate is used as an oxidizing agent to determine the hydrogen peroxide amount in a solution.

• Hydrogen peroxide reduces the permanganate to a colorless product.

• The hydrogen ions take part in the reaction as a reactant.