Chemistry Practice Problems Atomic, Ionic, and Molecular Solids Practice Problems Solution: Describe the difference between vitreous silica an...

Solution: Describe the difference between vitreous silica and soda-lime glass. What are some advantages and disadvantages of each of these types of glass?

Problem

Describe the difference between vitreous silica and soda-lime glass. What are some advantages and disadvantages of each of these types of glass?

Solution

Soda-lime glass, also called soda-lime-silica glass, is the most prevalent type of glass. The soda-lime glass contains 70% of SiO2 accompanied further by CaO and Na2O.

The chemical ordering is very strong; each silicon atom is connected to four oxygen atoms and each oxygen atom is shared by two silicon atoms as shown below.


Note, Si - pink and O - red 

Vitreous Silica only has SiO bonded similarly to soda-lime glass but does not have the same impurities as soda glass. 

In soda-silica glass, the continuity of the network is disrupted by the addition of Na2O ions. 

These make the network more sophisticated and difficult for the atoms to arrange themselves in suitable configurations for crystallization to occur, forming non-crystalline structures.

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