Question

missed this? watch kcv 5.2, read section 5.2 you can click on the review link to access the section in your

part a

which pair of atoms forms the most polar bond?

p and cl

si and cl

p and o

si and o

Explanation:

To determine the most polar bond, we use the concept of electronegativity difference (\(\Delta EN\)). The greater the \(\Delta EN\), the more polar the bond.

• For \(P - Cl\): \(EN_{Cl}=3.16\), \(EN_{P}=2.19\), \(\Delta EN = 3.16 - 2.19=0.97\)
• For \(Si - Cl\): \(EN_{Cl} = 3.16\), \(EN_{Si}=1.90\), \(\Delta EN=3.16 - 1.90 = 1.26\)
• For \(P - O\): \(EN_{O}=3.44\), \(EN_{P}=2.19\), \(\Delta EN=3.44 - 2.19 = 1.25\)
• For \(Si - O\): \(EN_{O}=3.44\), \(EN_{Si}=1.90\), \(\Delta EN=3.44 - 1.90=1.54\)

Since \(Si - O\) has the largest electronegativity difference, the \(Si - O\) bond is the most polar.

Answer:

Si and O