How is SiO2 polar?

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Maria1E
Posts: 61
Joined: Sat Jul 22, 2017 3:01 am

How is SiO2 polar?

Postby Maria1E » Thu Dec 07, 2017 10:12 pm

Don't its dipole moments cancel out?

Troy Tavangar 1I
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

Re: How is SiO2 polar?

Postby Troy Tavangar 1I » Thu Dec 07, 2017 11:06 pm

SiO2 should be nonpolar I believe. Are you thinking of SO2 which is polar?

Maria1E
Posts: 61
Joined: Sat Jul 22, 2017 3:01 am

Re: How is SiO2 polar?

Postby Maria1E » Fri Dec 08, 2017 5:23 pm

No, this was a question on the midterm and I put that it was polar and got it right. But I'm not exactly sure what makes it polar.

Kyle Alves 3K
Posts: 46
Joined: Thu Jul 27, 2017 3:01 am

Re: How is SiO2 polar?

Postby Kyle Alves 3K » Sat Dec 09, 2017 3:19 pm

It might be one of those "you should just know" pieces of information: SiO2 can't exist as a molecule by itself, Si has to be connected to two other oxygens atoms to make a covalent network, rather than just being a molecule by itself. Although it makes a nonpolar molecule overall, the SiO2 becomes polar. At least thats what I could find online


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