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  • How to turn your bleach-stained-red bathtub white again

    Not sure about the above statement that oxygen is a reducing agent. In chemistry, an oxidising agent ( oxidant, oxidiser) is a substance that has the ability to oxidise other substances. Common oxidising agents are oxygen and hydrogen peroxide. If you want to see how hydrogen peroxide works, drop a very small piece (less that half fingernail size) of raw steak in a tablespoonfull of hydrogen peroxide. The bubbles released contain oxygen which is the active ingredient in oxidising the stain. If you want to speed up this experiment, use a piece of raw liver the same size as the steak - and stand back!

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