HELP!! Due tomorrow!! Bond Angles of molecular structures?

Question

I need help with predicting the bond angles for the following molecules and ions, which are due tomorrow. The exponent symbol (^) represents an exponent, and the numbers following letters indicate subscripts. 
a) POCl3, SO4^2-, XeO4, PO4^3-, ClO4^- (all tetrahedral)
b) NF3, SO3^2-, PO3^3-, ClO3^- (all trigonal pyramidal)
c) ClO2^-, SCl2, PCl2^- (all bent or angular)  
I believe that each of these molecules and ions should have different bond angles, but I'm also considering that they might share similar bond angles since they belong to the same group. I'm feeling quite lost on this topic and would greatly appreciate any assistance. Thank you very much for your help!

Anonymous · Accepted Answer

For (a), the angles will all be 109.47 degrees (tetrahedral angle), except for POCl3.  In that case, the P-O bond acts as if it needs more space, so it pushes the P-Cl bonds closer to one another.  The Cl-P-Cl angles will be less than 109.47, while the O-P-Cl angles will be a little larger.  
(b)  Similar:  the molecules/ions will all have bond angles slightly less than 109.47 degrees, since the non-bonding pair of electrons pushes the bonds away.  
(c)  Now you have two nb pairs pushing on the bond pairs, so the angles will again be smaller than 109.47… because of the two nb pairs, they will actually be smaller than the angles in the molecules/ions in (b).

Anonymous · Answer

Pocl3 Molecular Geometry

Doris Runolfsdottir · Answer

This Site Might Help You.RE:HELP!! Due tomorrow!! Bond Angles of molecular structures?Predict the bond angle for each molecule of ion in part a, b, c. ^ means exponent. Numbers after letters is subscript.a) POCl3, SO4^2-, XeO4, PO4^3-, ClO4^-      (tetrahedrals)b) NF3, SO3^2-, PO3^3-, CLO3^-   (trigonal pyramidal)c) ClO2^-, SCl2, PCl2^-     (bent or angular)I&hellip;

Anonymous · Answer

For the best answers, search on this site shorturl.im/GlqeHA) Tetrahedral B) Trigonal Planar 109.5 C) Trigonal Pyramidal <109.5 D) Bent (VShaped) <109.5 E) Square Planar 90

Anonymous · Answer

a)  Tetrahedral…  I believe the angle is 109.5.
b.) Trigonal Pyramidal… I believe it is 107
c.)  Bent or angular… I believe it is 105.
Taken from meh chem book.

Joesph Anderson IV

HELP!! Due tomorrow!! Bond Angles of molecular structures?

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