Sodium silicate is used, along with magnesium silicate, in muffler repair paste. When dissolved in water, both sodium silicate, and magnesium silicate form a thick paste that is easy to apply. When the exhaust system of an internal combustion engine heats up to its operating temperature, the heat drives out all of the excess water from the paste. The silicate compounds that are left over have glass-like properties, making a somewhat permanent, brittle repair
Sodium carbonate and silicon dioxide react when molten to form sodium silicate and carbon dioxide.
Sodium silicate is a white solid that is soluble in water, producing an alkaline solution. There are many kinds of this compound, including sodium orthosilicate, Na4SiO4; sodium metasilicate, Na2SiO3; sodium polysilicate, (Na2SiO3)n; sodium pyrosilicate, Na6Si2O7, and others. All are glassy, colourless and dissolve in water.
Sodium silicate is stable in neutral and alkaline solutions. In acidic solutions, the silicate ion reacts with hydrogen ions to form silicic acid, which when heated and roasted forms silica gel, a hard, glassy substance
Potassium Metasilicate
CaSiO3A white to gray inosilicate mineral (a pyroxenoid) that crystallizes in the triclinic system in tabular crystals and has a pearly or silky luster on the cleavages; hardness is 5-5.5 on Mohs scale, and specific gravity is 2.85. Also known as tabular spar.
It is chemical having MF BaSiO3.
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