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Is SiO2 is a polar molecule or not? the difference in electronegativity between the two atoms is 1.7 I read that SiO2 doesn't exist as single molecule, in which the Si connected to 4 oxygen? so my question can I consider it polar thanks

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Sio2 doesn't exist as a molecule rather exists as network of si and o bonds with si bonded to 4 O atoms. SiO2 simply denotes their ratio in the complete structure. Si-O bonds are very polar but there are four si-O bonds which cancel the dipole, making the structure as a whole, non-polar.

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  • $\begingroup$ thanks a lot it's very now, one question if i may ask can attract or interaction happen with this molecule and other moleculue although SiO2 nonpolar. $\endgroup$ – studentrr Mar 18 '16 at 9:22
  • $\begingroup$ Yes interactions can happen. Glass is made up of siO2 and we know glass and water are adhesive, as they form a concave meniscus. This is because of very weak bonds between the O atoms of sio2 and the H atoms of water. $\endgroup$ – jatin Mar 18 '16 at 9:27
  • $\begingroup$ thanks for the info. i was searching for this kind of explanation, so can i consider a some kind of attraction even small one between SiO2 bonds and c=o bond ? $\endgroup$ – studentrr Mar 18 '16 at 9:36
  • $\begingroup$ As c=o bond is polar, yes. $\endgroup$ – jatin Mar 18 '16 at 10:15
  • $\begingroup$ so it can be interaction between c=o and sio2, thank u so much for the clear info. $\endgroup$ – studentrr Mar 18 '16 at 10:30

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