Achieve Week 7-8 Question 10

[Leticia Guzman 3H]

The first part of the question asks where the negative pole is located on the given molecules. If the electronegativity difference between C and F is greater than that between O and C, why is the net vector between the two F atoms and not C and F? Thanks!

[Ryan Thompson 2J]

Since O is also a very electronegative element, the magnitude is canceled more than the other molecule. Therefore the O cancels out the dipole created between the two F atoms, and the answer would be COFH.

[Isaac 14B]

The net vector occurs in between the two F atoms because their electronegativity differences to the C atom is greater than between the C and O atoms. The net vector is a result of having two F atoms pointing in what can be reasoned as more of the same cardinal (right) direction compared to the single O towards the left.