The reaction between hydrogen peroxide (H2O2) and potassium permanganate (KMnO4) offers a colorful demonstration of a redox reaction. The purple potassium permanganate is reduced to a clear liquid by the hydrogen peroxide. This occurs because potassium permanganate contains a manganese atom with an oxidation state of +7. Hydrogen peroxide reduces the atom to an oxidation state of only +2, causing the loss of color. The other byproducts of the reaction are oxygen gas (O2) and water (H2O).
Source: https://youtu.be/OLUyeCC-2Ko
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