Vsepr

[Jaba]

For the VSEPR, we learned both the molecular geometry and the electron pair geometry..

In Kaplan, they give 5 examples.... But in the chem course we learned like 20 or so....

Would it be safe to just study and know the ones from Kaplan? (Electron pair shape).

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[Shjfr]

I would just know them all... they really aren't that hard. Better to take a few minutes to learn them than to be kicking yourself if one shows up on the exam.

 

[TeamGuo]

yea know all of them. it's not too bad once you understand the pattern and the symmetry of the molecules.

split it into

Bonds lone pair electrons
2 0 = linear
3 0 = trig planar
2 1 = bent
4 0 = tetrahedral
3 1 = trig. pyramidal
2 2 = bent
5 0 = trig. bipyramidal
4 1 = seesaw
3 2 = T-shaped
2 3 = linear
6 0 = octahedral
5 1 = sq. pyramidal
4 2 = sq. planar

So there's a pattern to the geometry, visualize it 3-D or use a model kit. Once you get it there's no need for memorization since it will be logical.

Good luck!