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Cool Ass Science in action


morabu

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I've seen the same effect done with ultra-pure water. When water is at or near 100% purity, the freeze point lowers because there are no impurities for ice crystals to form around. If you drop a tiny grain of sand into it, it'll freeze solid almost instantly.
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Found this wikipedia, don't know if it will work though,

 

This is the well-known "fizzing" reaction between baking soda and vinegar. 84 grams of sodium bicarbonate react with 750 g of 8% vinegar to make 82 g sodium acetate in water. By subsequently boiling off most of the water, one can refine either a concentrated solution of sodium acetate or actual crystals.

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