Question

Determine the electron-group arrangement, molecular shape, and ideal bond angle for the following molecule: PH3 Electron-group arrangement: tetrahedral trigonal pyramidal V-shaped trigonal planar Molecular shape: tetrahedral trigonal pyramidal T-shaped bent Ideal bond angle: degrees.

Answer 1

Answer:

The molecular shape and ideal bond angle of the $PH_{3}$ is trigonalbipyramidal and $109.5^{o}$ respectively.

Explanation:

The structure of  $PH_{3}$  is as follows.(in attachment)

From the structure,

Phosphor atom has one lone pair and three hydrogens are bonded by six electrons.

Therefore, total electrons invovled in the formation $PH_{3}$  is eight.

Hence, four electron groups which indicate the tetrahedral shape. But one pair is lone pair i.e, present on the phosphor atom.

Therefore, ideal geometry of the $PH_{3}$  molecule is Trigonalbipyramidal.

The ideal angle of trigonalbipyrmidal is $109.5^{o}$.

All three bonds of P-H has $109.5^{o}$.

Therefore, ideal bond angle is $109.5^{o}$.