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288
Chapter 9: Molecular Structures
(c) PO 4 3– (32 e – ) The type is AX 4E 0, so the electron-pair geometry and the molecular
. . .
. .
. . .
.
O
.
. O.
.
..
.. .
O P O
3
geometry are both tetrahedral.
P
O O
(d) CS 2 (16 e – ) The type is AX 2E 0, so the electron-pair geometry and the molecular geometry are both
..
..
..
S C . S.
linear.
16. Adapt the method given in the answers to Question 14.
(a) CO 2 (16 e – ) The type is AX 2E 0, so the electron-pair geometry and the molecular
. . . .
O C O . . ..
geometry are both linear.
(b) NO 2 – (18 e – ) The type is AX 2E 1, so the electron-pair geometry is triangular planar and the
.. ..
..
..
.. .
O
O
molecular geometry is angular (120°).
O N O N
O O
(c) SO 2 (18 e – ) The type is AX 2E 1, so the electron-pair geometry is triangular planar and the
. . . . . . .
. . . .
molecular geometry is angular (120°).
O S O S
O O
(d) O 3 (18 e – ) The type is AX 2E 1, so the electron-pair geometry is triangular planar and the
.. ..
..
..
.. .
molecular geometry is angular (120°).
O O O O
O O
(e) ClO 2 – (20 e – ) The type is AX 2E 2, so the electron-pair geometry is tetrahedral and the
molecular geometry is angular (109.5°).