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How is SiO2 polar?

Posted: Thu Dec 07, 2017 10:12 pm
by Maria1E
Don't its dipole moments cancel out?

Re: How is SiO2 polar?

Posted: Thu Dec 07, 2017 11:06 pm
by Troy Tavangar 1I
SiO2 should be nonpolar I believe. Are you thinking of SO2 which is polar?

Re: How is SiO2 polar?

Posted: Fri Dec 08, 2017 5:23 pm
by Maria1E
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.

Re: How is SiO2 polar?

Posted: Sat Dec 09, 2017 3:19 pm
by Kyle Alves 3K
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