sodium carbonate


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sodium carbonate,

chemical compound, Na2CO3, soluble in water and very slightly soluble in alcohol. Pure sodium carbonate is a white, odorless powder that absorbs moisture from the air, has an alkaline taste, and forms a strongly alkaline water solution. It is one of the most basic industrial chemicals. Sodium carbonate decahydrate, Na2CO3·10H2O, is a colorless, transparent crystalline compound commonly called sal soda or washing soda. Because seaweed ashes were an early source of sodium carbonate, it is often called soda ash or, simply, soda. The Solvay processSolvay process
[for Ernest Solvay], commercial process for the manufacture of sodium carbonate (washing soda). Ammonia and carbon dioxide are passed into a saturated sodium chloride solution to form soluble ammonium hydrogen carbonate, which reacts with the sodium chloride to
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 provides most sodium carbonate for industrial use. It is found in large natural deposits and is mined in Wyoming; it is also recovered (with other chemicals) from lake brines in California. The principal uses of sodium carbonate are in the manufacture of glassglass,
hard substance, usually brittle and transparent, composed chiefly of silicates and an alkali fused at high temperature. Composition and Properties of Glass
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 and the production of chemicals. It is also used in processing wood pulp to make paper, in making soapssoap,
a cleansing agent. It cleanses by lowering the surface tension of water, by emulsifying grease, and by absorbing dirt into the foam.

Ancient peoples are believed to have employed wood ashes and water for washing and to have relieved the resulting irritation with
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 and detergents, in refining aluminum, in water softening, and in many other applications. The Leblanc process, the first successful commercial process for making soda, is no longer used in the United States but played a major role in the Industrial Revolution.
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sodium carbonate

[′sōd·ē·əm ′kär·bə·nət]
(inorganic chemistry)
Na2CO3 A white, water-soluble powder that decomposes when heated to about 852°C; used as a reagent; forms a monohydrate compound, Na2CO3·H2O, and a decahydrate compound, Na2CO3·10H2O. Also known as soda.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

sodium carbonate

a colourless or white odourless soluble crystalline compound existing in several hydrated forms and used in the manufacture of glass, ceramics, soap, and paper and as an industrial and domestic cleansing agent. It is made by the Solvay process and commonly obtained as the decahydrate (washing soda or sal soda) or a white anhydrous powder (soda ash). Formula: Na2CO3
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
The work also tries to examine the use of sodium carbonate along with the nutrient medium in concrete and simulate the chemical reaction which is the major contribution of the authors to the research wherein earlier only urea had been tried by experts.
The company, which has a storage space of 5,800 square metres with a capacity of about 30,000 tons, plans to package and import 200 thousand tons of sodium carbonate in 2011.
(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.
In this study, characterization of Ankara Beypazari trona ore and its usage possibilities were studied in fritted ceramic glazes having different chemical compositions instead of sodium carbonate and sodium bicarbonate.
A leading manufacturer of sodium carbonate, Solvay, officially took control of ASCC from the Holding Company for Chemical Industries (HCCI), an Egyptian State-owned holding company, on November 9 when ASCC's general assembly was convened to confirm the transfer of ownership and appoint the Solvay directors to the Board of ASCC.
Brussels-based Solvay has acquired 100% of Egyptian state-owned Alexandria Sodium Carbonate Co (ASCC) for Egyptian pounds (uE) 760m ($136m, E101m), the company said in a statement on Friday.
In a paper published recently in the journal Environmental Science and Technology, the pair describe a process whereby air is pumped through a chamber containing sodium hydroxide, which reacts with the C[O.sub.2] in the air to form sodium carbonate. This is then mixed with lime to form calcium carbonate--or limestone--which is then burnt, releasing pure C[O.sub.2], which can be collected and stored.
Stock up on plain soap, baking soda (sodium bicarbonate), vinegar, washing soda (sodium carbonate), lemon juice and borax.
It contains sodium carbonate, or soda ash, and sodium bicarbonate.
In this work materials of analysis of thermodynamic premises and main principles of the technology of out-of-furnace (ladle) desulfuration of electric furnace ferronickel by sodium carbonate (soda ash) are presented.
The black liquor inorganics consist mainly of sodium carbonate and sodium sulfate.
A spray of sodium carbonate, bicarbonate, and trace amounts of one of the iron-ligand catalysts, followed by a spray of the oxidizing agent tertiary butyl hydroperoxide, killed all spores in tests with the bacterium Bacillus atrophaeus, the scientists reported in Pittsburgh last month at the Society of Environmental Journalists annual meeting (see http://www.scienee news.org/articles/20041106/food.asp).

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