AXE formula
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AXE formula
is it possible to determine the shape of a molecule if you're only given the AXE formula, if so how do you do it?
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Re: AXE formula
It is possible. The AXE formula tells you how many regions of electron density there are, which ones are specifically bonding pairs, and which ones are lone pairs. This is all that is needed to determine molecular shape.
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Re: AXE formula
From what i understand it is necessary to know the shape that corresponds to the formula. This means memorizing which formulas are associated to which shape.
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Re: AXE formula
Yes. A represents the center atom, X represents atoms bonded to the center atom, and E represents lone electron pairs. X and E together represent regions of electron density.
Each AXE formula corresponds to a different molecular structure shown in the chart posted by Jack.
Each AXE formula corresponds to a different molecular structure shown in the chart posted by Jack.
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Re: AXE formula
I believe if they give you the molecular formula and the AXE formula you could determine the shape. Say if you were given H2O: AX2E2... then you know there are 2 bonding atoms and 2 lone pairs. Then once you draw the molecule out you could figure out its shape.
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Re: AXE formula
Enzo_1I wrote:From what i understand it is necessary to know the shape that corresponds to the formula. This means memorizing which formulas are associated to which shape.
do you happen to know if theres anyway to know the corresponding shape aside form the AXE formula? or must we memorize those too?
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Re: AXE formula
There really isn't another way, the best thing to do is just memorize them because the AXE formula tells you what shape the molecule is.
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Re: AXE formula
The only way for you to know the shapes is to simply memorize them using the table above or one that you can search up online. By knowing AXE, that should in turn help you figure out the different geometric shapes of each molecule.
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Re: AXE formula
Yes. With the AXE formula you can deduce what shape and bond angle the molecule will have based on charts and tables.
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Re: AXE formula
Also be aware that AXE is a specific VSEPR Group that will help you determine MG or molecular geometry.
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Re: AXE formula
yes you can determine the molecular shape of the molecule, knowing the AXE formula because the number of electron densities are known. By counting the number of lone pairs and the number of atoms around the central atom you can know the shape and bond angles.
Re: AXE formula
It's possible but be aware of that there are molecules with different shapes but same AXE Formula. This is because they have the same number of electron densities. For instance, tetrahedral and trigonal pyramidal are both AXE4 because they both have 4 regions of electron densities.
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Re: AXE formula
To learn these I just made a chart, or you can write down the one posted above as it can be super helpful, and then put it all into flashcards on quilt. I studied that until i had it memorized, then, doing a bunch of problems switches the memorization from route to actual understanding.
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Re: AXE formula
Yes, the AXE formula can help you draw the shape of the structure, but it will not tell you the elements involved.
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Re: AXE formula
danielruiz1G wrote:is it possible to determine the shape of a molecule if you're only given the AXE formula, if so how do you do it?
Yes because the AXE formula tells you the regions of electron density which is all you need to determine the shape.
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Re: AXE formula
Arlene Linares 3A wrote:How do we figure out the AXE formula? I am still having trouble with this.
A is the central atom. X is the number of atoms bonded to the central atom. E is the number of lone pairs on the central atom.
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