00:01
If we talk about valence shell electron pair repulsion which is wespa model, how it is used to predict the bond angle and geometry? so first thing, draw lewis structures.
00:28
First thing we need to do, draw the lewis structures of the molecules.
00:32
Second, count the number of valence electrons around central atom.
00:54
This includes bonding and non -bonding electron pairs.
01:09
Third, we need to identify the electron group geometry based on the arrangement and then fourth one is, fourth step is predict the molecular geometry based on, electron group geometry based on this only.
01:45
Now let's see one one example of three of the cases.
01:49
If i talk about carbon, so what it is, carbon dioxide.
01:55
So first of all let's draw the structure of carbon dioxide 1, 2, 3, 4 and here 1, 2, 3, 4, 5, 6.
02:02
This also 1, 2, 3, 4, 5, 6.
02:05
So this is going to be its lewis dot structure.
02:09
So we can say that the electron geometry is linear.
02:13
Okay, it's linear geometry.
02:16
So molecular structure is also linear and we can say what kind of bond it is, 180 degree bond.
02:23
So this is for carbon.
02:24
Let's take an example for oxygen also.
02:28
So for oxygen we can take an example for water...