Potash

Potash (K2CO3) potassium carbonate, one of the salts known to people in ancient times. Usually potassium contaminated with various impurities, so does not have such a pure white color, like crushed potassium carbonate. Until the 20th century in Europe, potash was one of the most important industrial chemicals. This was prepared by water extraction of ash, with a further purification to the required level. Production was concentrated in places rich in forest somewhere in Europe, but mainly in North America.

Potash is potassium carbonate, one of the salts known to people in ancient times

In the old potash extracted from the ashes that remained after the burning wood. To get it cut down and then burned huge forests to ashes.

Many potassium have potatoes, beets, tomatoes, eggplants, corn, and most of all - in the sunflowers. In the ash of sunflower haulm potash ash present in an amount up to 50%. You can try to select from the ashes of pure potash: Sunflower ash is shaken with the same mass of hot water, allow to settle and filter water extract, the latter is evaporated to dryness in a porcelain cup or glass. This produces a gray powder with impurities. For purification it was dissolved in an equal amount by weight of hot water (50-60 degrees Celsius) and the solid was filtered. After evaporation of the solution is possible to isolate a very pure potash.

Today potash is obtained by electrolysis of potassium chloride, whereby a potassium hydroxide which reacts with carbon dioxide to form water and potassium carbonate.

2KOH + CO2 = K2CO3 + H2O

Potash is used for the manufacture of liquid soaps, glass, dyeing, as a fertilizer for plants, for the photography, as an additive to reduce the freezing point, as additive to concrete.

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