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Grade: 12

                        

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

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.
2 years ago
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