Question

please solve and label all

CALCULATIONS total # valence # bond Formulaelectrons Lewis structure pairs Itt non pairs ps VSEPR SiH4 CH2Cl2 (on C only)(on C only) kon С only) (on C only) | (on C only) | CH3OH H20 H3O* lot lot ot Not Not applicable applicable applicable applicable lapplicable applicabie HF 12

Answer 1

SiH4:

Total number of valence electrons = 4 + 4(1) = 8

Lewis dot structure

H-Si-H

# bond pairs = 4

# nonbond pairs = 0

# electron groups = 4 (electron groups on central atom)

electron geometry = tetrahedral

molecular geometry = tetrahedral

Structure from VSEPR theory : tetrahedral

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CH2Cl2:

Total number of valence electrons = 4 + 2(1) + 7(2) = 20

Lewis dot structure

CI CI

# bond pairs = 4

# nonbond pairs = 6 (electrons on central atom and surrounding atoms)

# electron groups = 4

electron geometry = tetrahedral

molecular geometry = tetrahedral

Structure from VSEPR theory : tetrahedral

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CH3OH (it is a two centered molecule)

Total number of valence electrons = 4 + 4(1) + 6(1) = 14

Lewis dot structure

HC-O-H

# bond pairs = 4

# nonbond pairs = 0 (electrons on C only)

# electron groups = 4

electron geometry = tetrahedral

molecular geometry = tetrahedral

Structure from VSEPR theory : tetrahedral

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H2O

Total number of valence electrons = 6 + 2(1) = 8

Lewis dot structure

# bond pairs = 2

# nonbond pairs = 2

# electron groups = 4 (electron groups on central atom)

electron geometry = tetrahedral

molecular geometry = bent

Structure from VSEPR theory : bent

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H3O+

Total number of valence electrons = 6 + 3(1) - 1= 8

Lewis dot structure

# bond pairs =3

# nonbond pairs = 1

# electron groups = 4 (electron groups on central atom)

electron geometry = tetrahedral

molecular geometry = pyramidal

Structure from VSEPR theory : pyramidal

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HF

Total number of valence electrons = 7 + 1(1) = 8

Lewis dot structure

H-F