Cliffs AP Chemistry, 3rd Edition

The Chart Format

In this format, you fill in a chart to answer the question. When you draw the chart, use the edge

of your calculator case to make straight lines. Fill in the blanks with symbols, phrases, or in-

complete sentences. The grid forces you to record all answers quickly and makes it unlikely

that you will forget to give any part of the answer.

Essay 1

Given the molecules SF 6 , XeF 4 , PF 5 , and ClF 3 :

A. Draw a Lewis structure for each molecule.

B. Identify the geometry for each molecule.

C. Describe the hybridization of the central atom for each molecule.

D. Give the number of unshared pairs of electrons around the central atom.

Answer

1. Restatement: Given SF 6 , XeF 4 , PF 5 , and ClF 3. For each, supply

A. Lewis structure

B. geometry

C. hybridization

D. unshared pairs of electrons around central atom

Characteristic SF 6 XeF 4 PF 5 ClF 3

Lewis structure

Geometry Octahedral Square Triangular T-shaped

Planar Bypyramidal

Hybridization sp^3 d^2 sp^3 d^2 sp^3 dsp^3 d

Unshared pairs 0 2 0 2

Cl

F

F

F

P

F

F

F

F

F

Xe

F

F

F

F

S

F

F

F

F

F

F

Questions Commonly Asked About the AP Chemistry Exam

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