Asked Apr 21, 2019

Predict the geometry of each interior atom in acetic acid.



Expert Answer

Step 1

The Valence Shell Electron Pair Repulsion Theory (VSEPR) explains the geometry of a molecule. The shape of the molecule and the formula of compound does not have any direct relationship, the shape is determined using the Lewis structure of the molecule. The Lewis structure is an arrangement of atoms of the molecule in which the total valence electrons are distributed in such a way that all the atoms have complete octet.

According to VSEPR theory, each atom present in the molecule will have the geometry which results in minimum repulsion between the valence shell electrons of that atom.

Step 2

The geometry of atom can be predicted by determining the total number of valence electrons, the bonds pairs (bonding electrons) and the lone pairs on the atom.

Here, the bonding electrons of an atom are number of electrons involved in bonding with other atoms and lone pairs are electrons not involved in bonding, they are represented as dots (in pair(s)) on symbol of the respective atom.

The geometry of the atom can be predicted from the VSEPR theory using the table as shown on the white board.

Step 3

The structure of the acetic acid with labeled interior atoms is shown on the white board.

The general formula of the interior atom labelled as 1 in the structure of the acetic acid is AX4 because carbon atom is attached to 4 other atoms (3 Hydrogens and 1 Carbon).

The number of bond pairs will be 4. The number of valence electrons in carbon atom is 4 thus, there will be no lone pair present on it. According to VSEPR theory, the geometry of ...


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