00:01
Hello students, in this question we have been given some molecules and we have to predict the direction of dipole moments.
00:07
So dipole moments is a directional property and it is represented like this where head of the arrow is towards the more electronegative element.
00:24
Now let's look at the structures of the given molecules one by one.
00:29
Ch2cl2 will occupy a tetrahedral structure like this where two will be hydrogen atoms and two will be chlorine atoms.
00:41
Now since chlorine is more electronegative so direction of dipole moment in cl bond will be like this.
00:51
This will be towards chlorine which is the more electronegative element.
00:55
Now in carbon hydrogen bond, carbon is more electronegative so direction of the polarity in ch bond will be towards carbon atom like this.
01:07
Now chlorines are more electronegative than carbon so they will pull out this electron density towards themselves.
01:16
So all over direction of dipole moments will be in the direction of chlorine atoms.
01:23
Now let's look at the structure of chcl3.
01:26
In this carbon will be joint to one hydrogen atom and three chlorine atoms.
01:34
So this molecule will also be polar because ch bond will be polarized towards carbon atom and all the ccl bonds will be polarized towards chlorine atoms.
01:48
So net direction of dipole moment will be from the center of this triangle formed by the below three elements.
01:58
So this will be the net direction of dipole moment.
02:02
Now let's look at the structure of ccl4.
02:05
Ccl4 will also occupy a tetrahedral structure however the direction of dipole moments in the ccl bonds will be towards each of the chlorine atoms.
02:21
Since this is a symmetrical structure so net effect of polarity of all four chlorine atoms will be cancelled out and the all over molecule will be non -polar.
02:34
So total dipole moment will become zero.
02:37
Now let's look at the co2.
02:39
In carbon dioxide, carbon atom is joined to two oxygen atoms in a linear fashion.
02:46
Now carbon oxygen bond is polarized towards oxygen atom because oxygen is more electronegative.
02:54
Similarly the above oxygen will also polarize the co bond towards itself.
03:00
Since both these adjacent atoms are oxygen atoms so net effect of polarity will be cancelled out and co2 molecule will also be non -polar and net dipole moment in the co2 molecule will also be zero.
03:17
Now let's look at the next molecules.
03:21
Next we have n2o.
03:23
Now structure of n2o contains nitrogen in the center, a triple bonded nitrogen here and a single bonded oxygen here...
