H₂SiO₃ molecular volume 78.10
& metasilicate nbsp; shiny transparent glassy solid. 2.1-2.3g/cm³ density. Hydrofluoric acid soluble, potassium hydroxide or sodium hydroxide solution, and do not dissolve in water and other inorganic acids. Heat to 150 ° C decomposition of silica. With fierce reaction and hydrofluoric acid decomposition.
acid formerly known metasilicate, a binary acid, ionization equilibrium constant K₁ = 2 × 10^{-10 k (room temperature). Insoluble hydrochloric acid, sulfuric acid, hydrofluoric acid soluble. Soluble potassium hydroxide or sodium hydroxide solution, potassium silicate or sodium silicate Na₂SiO₃ K₂SiO₃ and water. The temperature of 150 ° C (decomposition). Heating to 150 ° Cabove decomposition of water and silica, silica silicon anhydride. Using the gas and vapor absorbents, catalysts or do other catalyst carrier. Not because silica compound with water, acid, mainly through silicate solution with the acid reaction in the system.
application areas for gas and vapor adsorption, grease, wax bleaching, catalytic and other vector preparation. Also for the production of tungsten wire flux, the chemical analysis of chemical reagents, contact agents and chromatographic separation of adsorbent, manufacture silica and silicate materials. In addition, analytical chemistry can insoluble nitrogen compounds such as calcium fluoride, aluminum fluoride into soluble solution for the determination of fluoride.}