In the video above, when the dish soap and milk mix, an interesting color burst effect occurs. This reaction happens as a result of the charges in the molecules. Milk, is comprised mostly of water, protein and fat molecules. Dish soap has a long molecule with one negatively charged end and one neutral end. When added to milk, the soap molecules' polar (charged) end is strongly attracted to the water in milk, while the non-polar (neutral) end is attracted to the fat.
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