QQuestionChemistry
QuestionChemistry
Identify the molecular geometry around the central atom of formaldehyde, CH^2O.
A. Trigonal pyramidal
B. Tetrahedral
C. Trigonal planar
D. Linear
E. Bent
12 months agoReport content
Answer
Full Solution Locked
Sign in to view the complete step-by-step solution and unlock all study resources.
Step 1:I'll solve this step by step using molecular geometry principles:
Step 2:: Determine the central atom
- In the molecule CH^2O (formaldehyde), carbon (C) is the central atom
Step 3:: Count the number of electron domains around the central atom
- Carbon is bonded to two hydrogen atoms - Carbon is double-bonded to one oxygen atom - Total electron domains = 3 - No lone pairs on the central carbon atom
Step 4:: Apply VSEPR (Valence Shell Electron Pair Repulsion) theory
- 3 electron domains with no lone pairs - Electron domain geometry: Trigonal planar - Molecular geometry: Trigonal planar
Step 5:: Confirm bond angles
- Bond angles will be approximately 120° around the central carbon - All atoms lie in the same plane
Step 6:: Analyze molecular structure
- The molecule is flat - Carbon is at the center - Oxygen is double-bonded to carbon on one side - Two hydrogen atoms are single-bonded to carbon on the other side
Final Answer
Trigonal planar Explanation: The molecular geometry of formaldehyde (CH^2O) is trigonal planar due to three electron domains around the central carbon atom with no lone pairs, resulting in 120° bond angles and a flat molecular structure.
Need Help with Homework?
Stuck on a difficult problem? We've got you covered:
- Post your question or upload an image
- Get instant step-by-step solutions
- Learn from our AI and community of students