Determine the geometries using vsepr theory .State the approximate bond angle(s) in each molecule and determine whether each molecule is polar or non polar a)BCl3 b)PCl5 c)NCl3 d)SO3 e)XeF4 f)HBF2?

Aug 22, 2015

See below

Explanation:

a) ${\text{BCl}}_{3}$

We leave it as an exercise for the student to do this one.

b) ${\text{PCl}}_{5}$

Another exercise, but here's a link to the structure of ${\text{PBr}}_{5}$ to help you.

c) ${\text{NCl}}_{3}$

(i) Lewis structure

This is an $\text{AX"_3"E}$ molecule.

(ii) Shape — Trigonal pyramid

(iii) Bond angles — slightly less than 109.5°

(iv) Polarity — polar

(d) ${\text{SO}}_{3}$

(i) Lewis structure

(from gallery4share.com)

This is an ${\text{AX}}_{3}$ system.

(ii) Shape — Trigonal planar

(iii) Bond angles — 120°

(iv) Polarity — nonpolar

All bond dipoles cancel, therefore

e) ${\text{XeF}}_{4}$

(i) Lewis structure

This is an ${\text{AX"_4"E}}_{2}$ structure.

(ii) Shape — square planar

(iii) Bond angles — 90°

(iv) Polarity — nonpolar

f) ${\text{HBF}}_{2}$

(i) Lewis structure

(from www.uwplatt.edu)

This is an ${\text{AX}}_{3}$ structure.

(ii) Shape — Trigonal planar

(iii) Bond angles — Approximately 120°.

(iv) Polarity — polar