Question

1. what shape is the following: (0.5 points) *

h₂co
○ linear
○ bent
○ trigonal pyramidal
○ trigonal planar
○ tetrahedral

1. what shape is the following: (0.5 points) *

pcl₃
○ linear
○ bent
○ trigonal pyramidal
○ trigonal planar
○ tetrahedral

Explanation:

Step1: Determine electron domains for H₂CO

Central C has 3 bonding domains (2 C-H, 1 C=O), 0 lone pairs. Total domains = 3.

Step2: Predict molecular shape for H₂CO

3 bonding domains, 0 lone pairs → trigonal planar.

Step3: Determine electron domains for PCl₃

Central P has 3 bonding domains (P-Cl), 1 lone pair. Total domains = 4.

Step4: Predict molecular shape for PCl₃

3 bonding domains, 1 lone pair → trigonal pyramidal.

Answer:

1. Trigonal Planar
2. Trigonal Pyramidal