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  Inorganic Chemistry

GLASS

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Glass is an amorphous and transparent solid which is obtained by solidification of various silicates and borates of potassium and calcium.

PREPARATION OF GLASS:

Ordinary glass is a mixture of sodium and calcium silicates and is produced by fusing together a mixture of sodium carbonate, calcium oxide and silicon dioxide (Silica) in a furnace at about 1700K

Na2CO3 + SiO2 ——> Na2SiO3 + CO2

CaO + SIO2 ——> CuSiO3

On continuously heating the entire amount of is driven out and clear viscous fused mass is obtained. It is poured into moulds to get different types of articles, which are allowed to cool gradually.

This typed of glass is called soda glass or soft glass which has the approximate composition, Na2SiO3, CaSiO3,.4SiO2.

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