WS8-4 VSEPR Theory and Polarity

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Chemistry 11
Unit 8 Atoms, Periodic Table and Bonding
Worksheet 8.4 VSEPR theory and polarity
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1.
Predict the shapes of the following: (a) FCl2 , (b) AsF5, (c) AsF3, (d) SeO2
2.
Predict the shapes of the following: (a) TeF4, (b) SbCl6 , (c) NO2 , (d) PO4
3.
Predict the shapes of the following: (a) IO4 , (b) ICl4 , (c) TeF6, (d) ICl2
4.
Predict the shapes of the following: (a) CS2, (b) BrF4 , (c) ICl3, (d) SeO3
5.
Predict the shapes of the following: (a) SbH 3, (b) PCl4 , (c) ClO3 , (d) SiO4
6.
Consider the following bonds: (i) N—S; (ii) Si—I; (iii) N—Br; using the table of electronegativities,
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3–
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4–
a)
Determine which atom in each of the following bonds that carries the partial negative charge.
b)
Which of the bonds is most polar?
7.
Which of the following bonds is most polar? In each bond, choose the atom that carries the partial
negative charge: (a) Hg—I; (b) P—I; (c) Si—F; (d) Mg—N
8.
Which of the following molecules would be polar: (a) SnCl4, (b) AsCl3, (c) H2Se, (d) PBr3, (e) SbCl5, (f) SO3
WS8-4 VSEPR Theory and Polarity.doc
1
Chemistry 11
Unit 8 Atoms, Periodic Table and Bonding
Worksheet 8.4 Answers VSEPR Theory and Polarity
1.
(a) Non-linear, (b) Trigonal Bipyramidal, (c) Trigonal Pyramidal, (d) Non-linear
2.
(a) See-saw, (b) Octahedral, (c) Non-linear, (d) Tetrahedral
3.
(a) Tetrahedral, (b) Square Planar, (c) Octahedral, (d) Linear
4.
(a) Linear, (b) Square Planar, (c) T-shaped, (d) Trigonal Planar
5.
(a) Trigonal Pyramidal, (b) Tetrahedral, (c) Trigonal Pyramidal, (d) Tetrahedral
6.
Consider the following bonds: (i) N—S; (ii) Si—I; (iii) N—Br; using the table of electronegativities,
a)
N, I, N
b)
N–S is the most polar because it has the greatest electronegativity difference between atoms.
7.
Si-F is most polar. I, I, F, N
8.
Which of the following molecules would be polar: AsCl3, H2Se, PBr3
WS8-4 VSEPR Theory and Polarity.doc
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