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What is sodium silicate? There are two types sodium silicates: Chemical formula Na2SiO3, Molecular formula 122.00. This is sodium metasilicate. The sodium orthosilicate is chemical formula Na4SiO4, with molecular formula 184.04. Sodium silicate (or sodium silicate) is a colorless solid that has a density 2.4g/cm3 but a melting point 1321K (1088). It is an organic binder. The solid sodium silicate is known in the south as sodium silicate and the north as natron. Aqueous solution of waterglass is also known as water glass. Pure water glass, which is transparent and colorless, is called water glass. However sodium silicate that is sold on the marketplace contains some impurities. It is also light blue. The rare colorless crystal sodium orthosilicate has a melting temperature of 1291K (1088). By hydrolysis, sodium silicate solution becomes alkaline (a little stronger than sodaash). It is possible to precipitate carbon dioxide by adding hydrochloric acid or sulfuric acid. Carbon dioxide should be kept out of storage. Frosted glass plugs should also be used to stop it from adhering to rubber plugs. In industry, sodium carbonate and quartz are commonly eutected to form Na2CO3+SiO2-Na2SiO3+CO2|. Because of the presence ferrite, the product has a light-blue-green color. It can be used as an inorganic binder (can be mixed together with talcum powder etc. Also used to make soap filler and concrete that is acid-resistant. This pigment can be used for exterior wall coating or poured in foundation soil to firm up soil.
Use of sodium silicate dust
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