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VSEPR

Posted: Sun Nov 17, 2019 6:25 pm
by Andrea_Torres
How is the VSEPR model used in determining shape? Is it also used in finding the angles?

Re: VSEPR

Posted: Sun Nov 17, 2019 6:33 pm
by DTingey_1C
He explained in class that we do not need to know the exact angles in the model, but we should know how the radii of atoms and other factors might impact the angles. Hope this helps.

Re: VSEPR

Posted: Sun Nov 17, 2019 7:36 pm
by Petrina Kan 2I
The shape is always determined by the number of bonding pairs and lone pairs for the VSEPR model. And then once we determine the shape based on those things, we can also see the bond angles according to that shape.

Re: VSEPR

Posted: Sun Nov 17, 2019 7:52 pm
by ZainAlrawi_1J
The number of bonding pairs and lone pairs attached to a central atom determines its shape, I would recommend looking up a VSEPR chart as it shows how intuitive it is.

Re: VSEPR

Posted: Sun Nov 17, 2019 7:56 pm
by erica thompson 4I
Use the VSEPR formula to determine the number of atoms and lone pairs in a molecule. Add up the Xs and the Es to determine the structure of the electrons (e.g. tetrahedral, octahedral, etc.), then remove as many atoms as there are Es to find the actual molecular shape. For example, tetrahedral molecular structures will always correspond to VSEPR formula AX4.

Re: VSEPR

Posted: Sun Nov 17, 2019 8:02 pm
by Vivianvelazquez_1J
You will not need to know the exact angles of the models, you will only need to know the shape of the model. the VSEPR model has a specific notation that can help you figure the shape of the model. If you look up a VSEPR chart you can easily distinguish the shapes from the different models using the VSEPR notation.

VSEPR model notation:
A= central atom
X= bonded pair
E= lone pair

If you can find the VSEPR model notation it will be easier to find the shape.