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Laboratory 8: Lewis Structure Model Part A: PRACTICE EXAMPLES : Count Valence E-

ID: 855800 • Letter: L

Question

Laboratory 8: Lewis Structure Model

Part A: PRACTICE EXAMPLES:

Count             Valence E-

Formula

Electron Geometry

And Structure

Molecular Geometry

1 N = 5                                    3 H = 3

          8 / 2 = 4 pair

NH3

           

H2O

CBr4

SO3        This is not a polyatomic ion

Count             Valence E-

Formula

Electron Geometry

And Structure

Molecular Geometry

1 N = 5                                    3 H = 3

          8 / 2 = 4 pair

NH3

           

H2O

CBr4

SO3        This is not a polyatomic ion

Explanation / Answer

Count of Valance electrons

Formula

Electron pair geometry

Molecular geometry

8

NH3

Tetrahedral

Trigonal pyramidal

8

H2O

Tetrahedral

Bent shape

32

CBr4

Tetrahedral

Tetrahedral

24

SO3

Planar

Planar

26

PI3

Tetrahedral

Pyramidal

14

CH3Cl

Tetrahedral

Tetrahedral

24

NO3-

Planar

Planar

24

CO32-

Planar

Planar

8

NH4+

Tetrahedral

Tetrahedral

8

CH4

Tetrahedral

Tetrahedral

18

SO2

Trigonal planar

Bent

Count of Valance electrons

Formula

Electron pair geometry

Molecular geometry

8

NH3

Tetrahedral

Trigonal pyramidal

8

H2O

Tetrahedral

Bent shape

32

CBr4

Tetrahedral

Tetrahedral

24

SO3

Planar

Planar

26

PI3

Tetrahedral

Pyramidal

14

CH3Cl

Tetrahedral

Tetrahedral

24

NO3-

Planar

Planar

24

CO32-

Planar

Planar

8

NH4+

Tetrahedral

Tetrahedral

8

CH4

Tetrahedral

Tetrahedral

18

SO2

Trigonal planar

Bent