potassium carbonate


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Related to potassium carbonate: potassium bicarbonate

potassium carbonate,

chemical compound, K2CO3, white, crystalline, deliquescent substance that forms a strongly alkaline water solution. It is available commercially as a white, granular powder commonly called potash, or pearl ash. It was originally obtained from wood ashes or from the residue left in pots after certain plants, e.g., kelp, were burned in them. It is prepared commercially chiefly by electrolysis of potassium chloride to form potassium hydroxide, which is then carbonated (e.g., by adding carbon dioxide gas). It is used in the manufacture of soft soaps and glass, for washing wool, and in the production of other potassium compounds.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Potassium Carbonate

 

, potash, K2C03, a salt; colorless crystals. Density 2.3 g/cm3; melting point, 89.4°C. Highly hygroscopic; solubility, 113.5 g per 100 g H2O at 20°C (156 g at 100°C). The solution is alkaline.

Potash has been extracted from the ashes of wood and herbaceous plants since ancient times. It is produced commercially mainly from natural potassium salts and as a by-product of the conversion of nepheline to aluminum oxide. Potassium carbonate is used in the preparation of liquid soaps, hard and crystal glasses, dyes, and photographic materials. It is also used as apotassium fertilizer.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

potassium carbonate

[pə′tas·ē·əm ′kär·bə‚nāt]
(inorganic chemistry)
K2CO3 White, water-soluble, deliquescent powder, melting at 891°C; insoluble in alcohol; used in brewing, ceramics, explosives, fertilizers, and as a chemical intermediate. Also known as potash; salt of tartar.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Potassium carbonate (0.55 g, 4 mmol), 5-methoxyresorcinol (0.14 g, 1 mmol), and 4-fluorobenzophenone (0.50 g, 2.5 mmol) were added to a 50 mL three-necked round-bottomed flask that equipped with a magnetic stirrer, a thermometer, a Dean-Stark trap fitted with a condenser and an argon inlet and outlet.
The result showed that all the glass samples were contaminated by either silica (Si[O.sub.2]) or alumina (A[L.sub.2][O.sub.3]) or both except the third glass which was composed of 80% boric acid + 20% potassium carbonate. Table 1 shows the actual composition of the glass sample.
For the first time potassium carbonate is employed as a pore-forming agent and from the results it is concluded that both potassium carbonate and sodium bicarbonate are better pore forming agents.
(a) First stage of melting: In the first stage of melting, potassium carbonate in the oxide form (K2O) was gradually reduced while sodium carbonate in the form of (Na2O) is gradually reduced at the same rate.
Prices for an installation service and a 25kg pack of auxiliary substance (potassium carbonate) are set at 50,000 yen ($423) and 18,000 yen ($150), respectively.
The team created the ylide (benzoylmethylene) triphenylphosphorane by ball-milling (phenacyl) triphenylphosphonium bromide with anhydrous potassium carbonate ([K.sub.2]C[O.sub.3]), a base.
The different gases given off by burning blackpowder include carbon dioxide and hydrogen sulfide, and produced salts or compounds include potassium carbonate, potassium sulfate and potassium monosulfide.
In the first bank of centrifuges, potassium carbonate is added to the water to raise the density of the solution to 1.2 g/cc.
It was hypothesized that the application of the fertilizer chemicals (Urea, Potassium Nitrate, and Potassium Carbonate) would actually stunt the growth of the crayfish over a period of two weeks.
This is a well-known reaction by which potassium cyanide slowly converts to potassium carbonate and releases hydrogen cyanide gas into the air.
They injected the chemical sodium dithionite--diluted in water and buffered with potassium carbonate and potassium bicarbonate--into a well for about 10 hours.

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