Animated pictures of 37 chemical reaction principles and dangers---Elephant Toothpaste

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principle: The core of this reaction is the same as the blood reaction in the previous issue, which is the decomposition of hydrogen peroxide. Mix 30% hydrogen peroxide and liquid soap, add some food coloring, and add potassium iodide as a catalyst. A small amount of hydrogen peroxide can produce a large amount of oxygen, forming foam under the action of soap. A safer version is to use low concentration (3%-6%) hydrogen peroxide and dry yeast as a catalyst. The raw materials are more available, but the reaction is not as violent. Highlights: After the reaction, a large amount of oxygen will accumulate in the bottle. You can try turning off the light and throwing a match into it to observe the combustion. Beware of fire. recorder: chemtoddler danger: Low to medium. Concentrated hydrogen peroxide is highly corrosive, so wear gloves when handling it. PS There is another way to do this experiment (source not found)