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Chapter 6, Lesson 5 Multimedia

Elephant's Toothpaste

When a catalyst is added to a empty soda bottle containing dish detergent and food coloring, a hot fluffy gel is formed rapidly, which roughly resembles toothpaste.

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  • Hydrogen peroxide decomposes on its own into water and oxygen gas.
  • This process is speed up by a catalyst.
  • In this reaction, the catalyst is potassium permanganate and the bubbles are full of oxygen gas.

Genie in a Bottle

When a catalyst is added to a empty soda bottle containing 30% hydrogen peroxide, the hydrogen peroxide decomposes rapidly, emitting a huge puff of steam and oxygen.

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  • Hydrogen peroxide decomposes on its own into water and oxygen gas.
  • This process is speed up by a catalyst.
  • In this reaction, the catalyst is potassium permanganate.
  • The reaction produces a lot of heat so the substance shooting out of the bottle is water vapor that is condensing in the cooler air.
  • Oxygen gas is invisible but is mixed in with the water vapor.

Decomposition of Hydrogen Peroxide

The chemical equation for the decomposition of hydrogen peroxide in the presence of a catalyst. Hydrogen peroxide yields water (in the form of steam) and oxygen.

When hydrogen peroxide decomposes, 2 molecules of hydrogen peroxide produce 2 molecules of water and 1 molecule of oxygen.