Molecular Geometry Lab - Part II(b)
NOTE: Click on the buttons below the structures to rotate the molecules.
7. a) The structures shown
below are three possible shapes for the generic XF3 compound,
where X is some unidentified element. For
each shape, give the name of the molecular geometry being displayed.*
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| b) What is the name of the electron arrangement from which each of the molecular geometries shown above arises? | |||
| c) For each shape, how many nonbonding electron pairs are present on the central atom? | |||
| d) Which of the following elements could lead to an XF3 compound having the geometry shown in (ii) above: Li, B, N, Al, P, Cl? Explain your reasoning. | |||
| e) From the same list of elements given in d), which could lead to an XF3 compound having the geometry shown in (iii) above? Explain your reasoning. |
8. a) The structures shown
below are three possible shapes for the generic XF4 compound,
where X is some unidentified element. For
each shape, give the name of the molecular geometry being displayed.*
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| b) What is the name of the electron arrangement from which each of the molecular geometries shown above arises? | |||
| c) For each shape, how many nonbonding electron pairs are present on the central atom? | |||
| d) Which of the following elements could lead to an XF4 compound having the geometry shown in (i) above: Be, C, S, Se, Si, Xe? Explain your reasoning. | |||
| e) From the same list of elements given in d), which could lead to an XF4 compound having the geometry shown in (iii) above? Explain your reasoning. |
9. a) The following Lewis
structures are incorrect. Explain what is wrong with each one and give a
correct Lewis structure for the molecule. (Relative positions of atoms are
shown correctly.)†
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b) Match
each of the molecules above with it's correct molecular geometry from the
choices below.
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| 10. a) Draw the Lewis Dot Structures for the following ions: IO2–, IO3–, and IO4–. | ||||||
| b) What is the VSEPR # and electron group arrangement for each of these ions? | ||||||
c) Match
each ion with it's correct molecular geometry from the choices given
below.
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| 11. a) Draw the Lewis Dot Structures for the following ions: SiCl4, TeF4, SbI5, BrF5, PCl5, and SeF6. | ||||||
| b) What is the VSEPR # and electron group arrangement for each of these ions? | ||||||
c) Match
each ion with it's correct molecular geometry from the choices given
below.
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* Brown, T.L., LeMay, H.E., & Bursten, B.E. (2000). Chemistry: The central science (8th ed.). New Jersey: Prentice Hall.
† Chang, R. (1991). Chemistry (4th ed.). New York: McGraw-Hill.
