Question

question 5 (1 point)
the bond angle in co₃²⁻ is expected to be approximately
90 degrees
109.5 degrees
120 degrees
145 degrees
180 degrees

Explanation:

Step1: Determine the molecular geometry

The $CO_{3}^{2 - }$ ion has a central carbon atom. Carbon has 4 valence electrons, and it forms 3 sigma bonds with 3 oxygen atoms in $CO_{3}^{2 - }$. Using the VSEPR (Valence - Shell Electron - Pair Repulsion) theory, the electron - pair geometry and molecular geometry of $CO_{3}^{2 - }$ is trigonal planar.

Step2: Recall bond angles for trigonal planar

In a trigonal - planar geometry, the bond angles are 120 degrees.

Answer:

C. 120 degrees