Question

1. complete the blanks by answering the blanks for the indicated atoms in the molecule aspirin. molecular geometry of carbon indicated by “a” __________ (0.75 pt) bond angle around carbon indicated by “a” ________ (0.75 pt) hybridization at a of carbon indicated by “a” ________ (0.75 pt) molecular geometry of carbon indicated by “b” ________ (0.75 pt) bond angle around carbon indicated by “b” ________ (0.75 pt) hybridization at a of carbon indicated by “b” ________ (0.75 pt) overall total number of sigma (σ) bonds in aspirin ________ (0.75 pt) overall total number of pi (π) bonds in aspirin __________ (0.75 pt)

Explanation:

Step1: Analyze carbon - a

The carbon atom 'a' is bonded to four other atoms (four single - bonds). According to VSEPR theory, when a central atom has 4 bonding pairs and 0 lone pairs, the molecular geometry is tetrahedral, the bond angle is approximately 109.5°, and the hybridization is $sp^{3}$.

Step2: Analyze carbon - b

The carbon atom 'b' is double - bonded to an oxygen and single - bonded to two other atoms. When a central atom has 3 bonding pairs and 0 lone pairs, the molecular geometry is trigonal planar, the bond angle is 120°, and the hybridization is $sp^{2}$.

Step3: Count sigma and pi bonds

Single bonds are sigma bonds. Double bonds consist of 1 sigma and 1 pi bond. In aspirin, count all single bonds for sigma bonds and double bonds for pi bonds. There are 21 single bonds (sigma bonds) and 5 double bonds (5 pi bonds).

Answer:

Molecular geometry of Carbon indicated by "a": Tetrahedral
Bond angle around Carbon indicated by "a": 109.5°
Hybridization at a of Carbon indicated by "a": $sp^{3}$
Molecular geometry of Carbon indicated by "b": Trigonal Planar
Bond angle around Carbon indicated by "b": 120°
Hybridization at a of Carbon indicated by "b": $sp^{2}$
Overall total number of sigma (σ) bonds in Aspirin: 21
Overall total number of pi (π) bonds in Aspirin: 5