vsepr formula

(Polar molecules, Non-polar molecules, etc.)

Moderators: Chem_Mod, Chem_Admin

Savannah Mance 4G
Posts: 107
Joined: Fri Aug 30, 2019 12:17 am

vsepr formula

Postby Savannah Mance 4G » Tue Dec 03, 2019 10:44 pm

When a question asks for the VSEPR formula, is it asking for me to explain how the vsepr theory of electron repulsion relates to the molecule? What does it mean by formula?

chemboi
Posts: 101
Joined: Sat Jul 20, 2019 12:16 am

Re: vsepr formula

Postby chemboi » Wed Dec 04, 2019 1:35 am

My interpretation is the AXnEm form of central atom, # surrounding atoms, and # lone pairs. If anyone else knows for sure, that would be greatly appreciated!

Rishika Yadav 3D
Posts: 53
Joined: Wed Sep 11, 2019 12:17 am

Re: vsepr formula

Postby Rishika Yadav 3D » Wed Dec 04, 2019 2:33 am

Yes, the VSEPR formula is the AXE formula.

Kaitlynn Tran 3F
Posts: 54
Joined: Wed Sep 18, 2019 12:20 am

Re: vsepr formula

Postby Kaitlynn Tran 3F » Thu Dec 05, 2019 10:20 pm

The VSEPR formula is a way to denote how many central atoms, bonded atoms, and lone-pairs there are on the molecule. It follows the pattern of AnXnEn, where A is the central atom, X is a bonded atom, E is a lone pair, and the subscript n is the number of each. So a molecule with 3 bonded atoms around the central atom and 2 lone pairs would be AX3E2 and T-shaped.

Maika Ngoie 1B
Posts: 97
Joined: Fri Aug 02, 2019 12:16 am

Re: vsepr formula

Postby Maika Ngoie 1B » Sun Dec 08, 2019 6:29 pm

The VSEPR formula means the question is asking you to write out the AXE formula.

jisulee1C
Posts: 149
Joined: Thu Jul 25, 2019 12:17 am

Re: vsepr formula

Postby jisulee1C » Sun Dec 08, 2019 6:43 pm

The VSEPR formula depends on the valence electron bonding to the central atom. Therefore depending one whether it is lone pair electron or bonded electron pair it will change the molecular shape of the molecule.

Aarushi Solanki 4F
Posts: 107
Joined: Sat Jul 20, 2019 12:17 am

Re: vsepr formula

Postby Aarushi Solanki 4F » Sun Dec 08, 2019 6:57 pm

It is asking for the formula AXbEc, where A is the central atom, X is a ligand (unspecific) with subscript b as the number of ligands attached to A, and E indicates a lone pair with subscript c describing the number of lone pairs on central atom A.

Leyna Dang 2H
Posts: 104
Joined: Thu Jul 25, 2019 12:17 am

Re: vsepr formula

Postby Leyna Dang 2H » Sun Dec 08, 2019 7:59 pm

You'd use the AXE formula where you'd look at the central atom of the compound and determine how many atoms are bonded to it and how many lone pairs it has.


Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 3 guests