2F.15

[Charlotte Messier 3C]

Could someone explain the answer to this question:
Noting that the bond angle of an sp3 hybridized atom is 109.5 degrees and that of an sp2 hybridized atom is 120, do you expect the bond angle between two hybrid orbitals to increase or decrease as the s-character of the hybrids is increased?

[Erika Patel 3I]

You would expect the bond angle to increase because as you gain s character you are moving more towards an sp² hybridization rather than an sp³ hybridization and the sp² has a higher bond angle.