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The question is whether HCl is polar or non-polar.
The short answer is
HCl is polar.
Here's why.
When we look at the HCl molecule we know that polarity results from the
unequal sharing the valence electrons. So those valence
electrons between the hydrogen in the chlorine are going to be shared unequally.
Chlorine is more electronegative.
That means that the electrons, those shared valence electrons will be more often
located around the Chlorine atom.
That makes it a little bit negative.
The hydrogen
is going to be a little bit positive.
So we can show that
by putting a delta symbol, delta negative, around the Chlorine. Delta positive around
the hydrogen and that shows that they're his bit of polarity there and that
the Chlorine has the electrons
much longer than
the hydrogen.
We can also visualize that
as a cloud of electrons around
the hydrogen and the chlorine molecule. And the valence electrons, those shared
electron,s
will spend more time around the chlorine. That would be represented above with
the blue
and then the red me the more positive around
the hydrogen.
Polarity very important because it lets us predict physical properties like
solubility, surface tension, melting point, in point and boling point
and also how the molecule might react chemically over interact with other
molecules.
This is Dr. B.,
and thanks for watching.