Question 8.4.2: a. Which of the following bonds are nonpolar? C — Cl H — Cl ......
a. Which of the following bonds are nonpolar?
C — Cl H — Cl H — H F — F P — H S — O B — F
b. Which of the following bonds is most polar?
C — Cl H — Cl H — H F — F P — H S — O B — F
You are asked to identify bonds as polar or nonpolar and to identify the most polar bond in a series of bonded atoms.
You are given a series of bonded atoms.
a. The H — H, F — F, and P — H bonds are nonpolar. Any bond between two like atoms is nonpolar because ∆χ = 0. The P — H bond is nonpolar by the coincidence that both P and H have the same electronegativity value of 2.1. The C — Cl, H — Cl, S — O, and B — F bonds are polar because when two different elements are bonded, the bond is almost always polar.
b. The B — F bond has the greatest ∆χ (4.0 − 2.0 = 2.0), so it is the most polar bond.