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The Learning Kingdom's Cool Word of the Day for October 27, 1999
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potash [n. POT-ash]
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Salts of potassium, including potassium carbonate, potassium
chloride, and potassium hydroxide, are collectively known as potash.
Potash occurs in veins and beds with halite (sodium chloride) all
around the world, and is an important industrial substance.
Originally, potassium carbonate was obtained by filtering water
through wood ashes and then boiling it in a large metal pot. In
early modern Dutch, the white material that was left behind was
called potasschen (pot ashes). It was used in soap making.
In 1807, the French chemist Sir Humphry Davy needed a name for the
light, silvery metal that he obtained from potash, so he called it
potassium.
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