Molecular Geometry and Polarity of CH3CN

The video tutorial explores the molecular geometry and polarity of acetonitrile (CH3CN). It begins by examining the molecular geometry of the two carbon atoms in the compound. The first carbon, bonded to nitrogen and a methyl group, is linear with a bond angle of 180 degrees. The second carbon, bonded to four groups, is tetrahedral with bond angles of approximately 109.5 degrees. The video then discusses the polarity of CH3CN, highlighting that nitrogen's higher electronegativity compared to carbon results in a polar molecule. The tutorial concludes with a recap of the molecular geometry and polarity findings.

What is the main focus of the video tutorial?

• The industrial applications of acetonitrile

• The chemical reactions of CH3CN

• The synthesis of acetonitrile

• The molecular geometry and polarity of CH3CN

What is the molecular geometry of the first carbon in CH3CN?

• Linear

• Trigonal planar

• Tetrahedral

• Bent

How many groups is the first carbon in CH3CN bonded to?

• Three

• Two

• Four

• One

What is the bond angle associated with the linear geometry of the first carbon in CH3CN?

• 120 degrees

• 109.5 degrees

• 90 degrees

• 180 degrees

What is the molecular geometry of the second carbon in CH3CN?

• Linear

• Trigonal planar

• Bent

• Tetrahedral

How many groups is the second carbon in CH3CN bonded to?

• Three

• Four

• One

• Two

What is the bond angle associated with the tetrahedral geometry of the second carbon in CH3CN?

• 180 degrees

• 90 degrees

• 109.5 degrees

• 120 degrees

Why is CH3CN considered a polar molecule?

• Because it has a symmetrical shape

• Due to the electronegativity difference between nitrogen and carbon

• Because it has no lone pairs

• Due to the presence of hydrogen bonds

Which element in CH3CN is more electronegative, contributing to its polarity?

• Nitrogen

• Carbon

• Hydrogen

• Oxygen

What was the conclusion about the molecular geometry and polarity of CH3CN?

• One carbon is linear, the other is tetrahedral, and the molecule is polar

• Both carbons are linear, and the molecule is non-polar

• Both carbons are tetrahedral, and the molecule is non-polar

• One carbon is trigonal planar, the other is linear, and the molecule is polar