Question #bc771

1 Answer
Dec 7, 2016

Answer:

Look at the chemical species to predict the dipole moment or find the electronegativity difference among the bonding species.

Explanation:

Find species dipole moment:

Consider a graphic of #COH_2# where the dipoles between the bonded species are depicted by black arrrows #->#, and the net dipole is shown below.
enter image source here

When there is a net dipole among the species, it will be a polar species .

As we can see from the dipole moment, the #COH_2# species is a polar one.


You could also use the Pauling scale of electronegativity to find the #ΔEN# between the bonded species:

Consider a molecule of Fluorine gas, #F_2#

the #ΔEN = 3.98-3.98 = 0# in the #F-F# bond.

The species is not polar.

See the link below for more information on the electronegativity difference:
https://socratic.org/questions/how-can-i-kiss-if-the-electronegativity-difference-is-ionic-polar-covalent-or-no#347261