Answer :

There are different types of glasses. The different constituents are used for their manufactures.

i. Soda lime glass/Soda glass/Soft glass


Constituents used in the manufacture:


a) Silicon dioxide (SiO2)


b) Calcium carbonate (CaCO3)


c) Sodium carbonate (Na2CO3)


ii. Hard glass


Constituents used in the manufacture:


a) Silicon dioxide (SiO2)


b) Potassium carbonate (K2CO3)


c) Calcium carbonate (CaCO3)


iii. Borosilicate glass


Constituents used in the manufacture:


a) Boron oxide (B2O3)


b) Aluminum oxide (Al2O3)


c) Silicon dioxide (SiO2)


iv. Find glass/Optical glass/lead glass


Constituents used in the manufacture:


a) Silicon dioxide (SiO2)


b) Potassium carbonate (K2CO3)


c) Lead oxide (PbO)


The raw materials needed for hard glass and borosilicate glass are:


For hard glass: Silicon dioxide (SiO2), potassium carbonate (K2CO3), calcium carbonate (CaCO3)


For borosilicate glass: Boron oxide (B2O3), aluminium oxide (Al2O3), silicon dioxide (SiO2)


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