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Longman Dictionary of Contemporary English
potash
noun
EXAMPLES FROM CORPUS
Potash shortage is often an induced condition caused by too much nitrogen reducing the potash content to an unbalanced proportion.
▪ A suitable high potash alternative is tomato food.
▪ Apple trees require plenty of potash and nitrogen, especially if the area is grassed over.
▪ Give a little extra nitrogen to blackcurrants and cooking apples; extra potash to gooseberries and red and white currants.
▪ Soap was locally made from animal fat and lime mixed with potash derived from the burning of green bracken.
▪ Spence's product was an ammonium alum which gradually displaced the potash alum which had been made principally at Whitby.
▪ The hydroelectric scheme may involve the potash industry in an extra expense.
▪ This has led to a shift away from the traditional use of phosphate and potash.
The Collaborative International Dictionary
Potash

Potash \Pot"ash`\, n. [Pot + ash.] (Chem.)

  1. The hydroxide of potassium hydrate, a hard white brittle substance, KOH, having strong caustic and alkaline properties; -- hence called also caustic potash.

  2. The impure potassium carbonate obtained by leaching wood ashes, either as a strong solution (lye), or as a white crystalline (pearlash).

Douglas Harper's Etymology Dictionary
potash

1751, earlier -pot-ashes (1640s), a loan-translation of older Dutch potaschen, literally "pot ashes" (16c.); so called because it was originally obtained by soaking wood ashes in water and evaporating the mixture in an iron pot. Compare German Pottasche, Danish potaske, Swedish pottaska, all also from Dutch. See also potassium. French potasse (1570s), Italian potassa are Germanic loan-words. The original plural was pot-ashes.

Wiktionary
potash

n. 1 the water-soluble part of the ash formed by burning plant material; used for making soap, glass and as a fertilizer 2 (context chemistry English) an impure form of potassium carbonate (K2CO3) mixed with other potassium salts 3 (context chemistry archaic English) in the names of compounds of the form "... of potash", potassium (for example, "permanganate of potash" = potassium permanganate)

WordNet
potash

n. a potassium compound often used in agriculture and industry [syn: caustic potash, potassium hydroxide]

Wikipedia
Potash

Potash is any of various mined and manufactured salts that contain potassium in water-soluble form. The name derives from pot ash, which refers to plant ashes soaked in water in a pot, the primary means of manufacturing the product before the industrial era. The word potassium is derived from potash.

Potash is produced worldwide at amounts exceeding 30 million tonnes per year, mostly for use in fertilizers. Various types of fertilizer-potash thus constitute the single largest global industrial use of the element potassium. Potassium was first derived by electrolysis of caustic potash (aka potassium hydroxide), in 1807.

Potash (disambiguation)

Potash may refer to:

  • Potash, potassium carbonate
  • Potash, Suffolk, United Kingdom
  • Potash City, Jordan
  • Potash Corporation of Saskatchewan
  • Potashes (gang), a 19th-century New York City street gang
  • Dan Potash, a television reporter for FSN Pittsburgh

Usage examples of "potash".

In solutions rendered faintly acid with acetic acid, they give a yellow precipitate with bichromate of potash.

Made by dissolving 12 grams of tartaric acid and 4 grams of stannous chloride in water, and adding potash solution till it is alkaline.

Its efficacy may be increased in this disease by adding to each bottle one ounce of the acetate of potash, and, when thus modified, it may be administered in the same manner as if no addition had been made to it.

Fritsche in the same year by the distillation of indigo with caustic potash developed a product which he also called aniline, the name being derived from the Portuguese word anil, meaning indigo.

Permanganate of potash is a salt much used in assaying, with some properties of which the student will have already become familiar.

Harding could have manufactured this substance by treating the carbonate of potash, which would be easily extracted from the cinders of the vegetables, by azotic acid.

The other substances, azotic acid and potash, were all at his disposal.

Harding then took two slips of zinc, one of which was plunged into azotic acid, the other into a solution of potash.

Cyrus Harding could have manufactured this substance by treating the carbonate of potash, which would be easily extracted from the cinders of the vegetables, by azotic acid.

Cyrus Harding then took two slips of zinc, one of which was plunged into azotic acid, the other into a solution of potash.

They consisted of short rolls of paper with a compound made of sugar and chlorate of potash on one end to which was attached a small globule of acid.

Properly prepared, it is extremely inflammable, especially when it has been previously saturated with gunpowder, or boiled in a solution of nitrate or chlorate of potash.

Each fluid ounce of the fresh juice contains about forty-four grains of citric acid, with gum, sugar, and a residuum, which yields, when incinerated, potash, lime, and phosphoric acid.

Chemically the Potato contains citric acid, like that of the lemon, which is admirable against scurvy: also potash, which is equally antiscorbutic, and phosphoric acid, yielding phosphorus in a quantity less only than that afforded by the apple, and by wheat.

Chemically this Love Apple contains citric and malic acids: and it further possesses oxalic acid, or oxalate of potash, in common with the Sorrel of our fields, and the Rhubarb of our kitchen gardens.