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Postby JamieVu_2C » Tue Nov 19, 2019 11:59 am

How does H2SeO4 have a dipole-dipole moment when the oxygen atoms are arranged around Se, with 2 H atoms attached to 2 of the O atoms? Don't the dipole moments cancel out for each oxygen?

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Re: H2SeO4

Postby karinaseth_1A » Tue Nov 19, 2019 12:55 pm

The tetrahedral shape of this compound means that the dipoles do not actually cancel out. They are at a 109.5 degree angle on 3D planes, not the 2D plane that Lewis structures look like. This means that the dipoles will not line up in space to cancel out.

Daria Azizad 1K
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Re: H2SeO4

Postby Daria Azizad 1K » Tue Nov 19, 2019 2:42 pm

Tetrahedral shapes will never be nonpolar if there are different atoms bonded, even though the way we draw it in 1D makes it seem like it.

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