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Soap is made by reacting an acid (for example sunflower and olive oils) with an alkali (for example sodium hydroxide). Sodium hydroxide being a much stronger alkali than sunflower oil is an acid, this reaction is done to weaken the alkali so it is not harmful to the skin. This reaction can be seen by dipping (for no more than a second) your fingers into a beaker of sodium hydroxide, the oil on your skin will react with the sodium hydroxide and a thin layer of soap will be formed on your fingers. This is safe to do, and does not hurt in anyway if you have only briefly dipped your fingers in. Some people add fragrances after this reaction has happened.

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16y ago

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