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Grade: 12

                        

what is the expected geometry of molecules of AX3, AX4, and AX5types? give one examples of each.

2 years ago

Answers : (1)

Rajdeep
231 Points
							
HELLO THERE!
 
Here I am assuming that X does not represent Halogens. It represents normal surrounding atoms of A.
 
First, AX3
Hybridisation = sp2
There is no Lone pair, so Geometry of the molecule is Trigonal Planar (bond angle = 120o)
Example: BH3
If there is one lone pair, geometry is V-shaped/Bent-Shaped.
 

Second, AX4:
Hybridisation = sp3
There is no Lone pair, so Geometry is Tetrahedral (bond angle = 109.5o).
Example: CH4
If there is one lone pair, geometry is Pyramidal.
If there are two lone pairs, geometry is V-shaped/Bent-shaped.
 
 
Third, AX5:
Hybridisation = sp3d
There is no lone pair, so geometry is Trigonal Bipyramidal.
Example: PCl5.
If there is one Lone Pair, geometry is Seesaw.
If there are two Lone Pairs, geometry is T-shaped.
If there are three Lone Pairs, geometry is Linear.
one year ago
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