I kind of need some guidance with "PART C" below:

A) The bond angles in CH4 are 109.5degrees, while the bond angles in NH3 are 107 degrees.
Based on this information, which type of repulsion must be greater:

BP-BP

LP-BP

((((for this part I got: "LP-BP" as the correct answer))))

&

B) The bond angles in NH3 are 107degrees, while the bond angles in H2O are 105degrees. Based on this information, which type of repulsion must be greater?

LP-BP

LP-LP

((((for this part I got "LP-LP" as the correct answer))))

What I need help with, however, is:

C) Based on your answers to Parts A and B, arrange the three types of repulsion in order of increasing magnitude:

i) LP-BP BP-BP LP-LP

BP-BP LP-LP LP-BP
LP-LP LP-BP BP-BP
BP-BP LP-BP LP-LP


& how can I tell/know for certain??? Any help is HUGELY appreciated!!

(BP = bonded pair LP = lone pair)

1 answer

lp/lp >> lp/bp > bp/bp