sodium silicate

sodium silicate, any one of several compounds containing sodium oxide, Na2O, and silica, Si2O, or a mixture of sodium silicates. Sodium ortho silicate is Na4SiO4 (or 2Na2O·SiO2); sodium meta silicate is Na2SiO3 (or Na2O·SiO2); sodium di silicate is Na2Si2O5 (or Na2O·2SiO2); sodium tetra silicate is Na2Si4O9 (or Na2O·4SiO2). All these compounds are transparent, glassy or crystalline solids that have high melting points (above 800°C) and are water soluble. They are produced chiefly by fusing sand and sodium carbonate in various proportions. The product is commonly known as water glass. The greatest single use of sodium silicates is as a raw material for making silica gel.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on sodium silicate from Fact Monster:

  • water glass - water glass water glass or soluble glass,colorless, transparent, glasslike substance available ...
  • silicate - silicate silicate, chemical compound containing silicon, oxygen, and one or more metals, e.g., ...
  • Encyclopedia: Compounds and Elements - Encyclopeadia articles concerning Compounds and Elements.

See more Encyclopedia articles on: Compounds and Elements

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