Molecular Geometry

Only available on StudyMode
  • Download(s) : 31
  • Published : November 11, 2012
Open Document
Text Preview
1

M olecular Geometry I - Investigation using Models (SL)
(DCP Lab)
Taksh Shah

KIS International School

Chemistry (SL)

1

Introduction
For this investigation we had use molecular models and make the following structures:

Symbol

Name of
Species

Lewis Diagram

Model

Bond

Polar or

Angle (°)

Non-Polar

BeCl2

Beryllium
Chloride

Linear

180

Non-Polar

C2H2

Acetylene

Linear

180

Non- Polar

BF3

Boron Trifluoride

Planar
Triangle

120

Non- Polar

C2H4

Ethylene

Planar
Triangle

120

Non-Polar

Molecular Geometry I- Investigation using Models (SL)

Chemistry (SL)

Symbol

2

Name of
Species

Lewis Diagram

Model

Bond

Polar or

Angle (°)

Non-Polar

CH4

Methane

Tetrahederal

109.5

Non-Polar

NH3

Ammonia

Trigonal
Pyramid

107

Polar

H2O

Water

Bent / VShape

104.5

Polar

SO2

Sulfur Dioxide

Bent / VShape

104.5

Polar

120

Polar or NonPolar

Planar
C2H2Cl2

Dichloroethene

Triangle
(Carbon)

Tetrahederal
(Carbon)
C2H6O

Ethanol
V-Shaped
(Oxygen)

Molecular Geometry I- Investigation using Models (SL)

HCH Bond =
109.5
COH = 104.5

Polar

Chemistry (SL)

3

Explanation
Symbol

BeCl2

C2H2

BF3

Structure

It’s Linear because it has 2 Bond Paris and 0
Lone Paris

It’s Linear because it has 2 Areas of negative
charge around the Carbons and 0 Lone Paris

It’s a Planar Triangle because it has 3 Bonding
Pairs and 0 Lone Pairs

Shape

Polarity

With the angle being 180°

Non-Polar because it has

the Molecular Shape

polar bonds and is

becomes Linear

symmetrical

With the angle being 180°

Non-Polar because it has

the Molecular Shape

polar bonds and is

becomes Linear

symmetrical

With the angle being 120°

Non-Polar because it has

the Molecular Shape

polar bonds and is

becomes a Planar Triangle

symmetrical

It’s a Planar Triangle because it has 3 Areas of

CH4

NH3

H2O

SO2

Non-Polar because it has

the Molecular Shape

polar bonds and is

Lone Pairs

C2H4

With the angle being 120°

negative charge around the Carbons Pairs and 0

becomes a Planar Triangle

symmetrical

With the angle being 109.5°

Non-Polar because it has

It’s a Tetrahedral because it has 4 Bonding Paris
and 0 Lone Pairs

It’s a Trigonal Pyramid because it has 3 Bonding
Paris and 1 Lone Pairs

It’s a Bent/V-Shape because it has 2 Bonding
Pairs and 2 Lone Pairs

It’s a Bent/V-Shape because it has 3 Areas of
positive charge around Sulphur and 1 Lone Pairs

the Molecular Shape

polar bonds and is

becomes a Tetrahedral

symmetrical

With the angle being 107°

Polar because it has polar

the Molecular Shape

bonds and is non-

becomes a Trigonal Pyramid

symmetrical

With the angle being 104.5°

Polar because it has polar

the Molecular Shape

bonds and is non-

becomes a Bent/V-Shape

symmetrical

With the angle being 104.5°

Polar because it has polar

the Molecular Shape

bonds and is non-

becomes a Bent/V-Shape

symmetrical
Polar because it has polar
bonds and is nonsymmetrical

It’s a Planar Triangle because it has 3 areas of

C2H2Cl2 negative charge around the Carbon atoms and 0
Lone Pairs

With the angle being 120°
the Molecular Shape

or

becomes a Planar Triangle
Non-Polar because it has
non-polar bonds and is
symmetrical

Molecular Geometry I- Investigation using Models (SL)

Chemistry (SL)
Symbol

4
Structure

Shape

Polarity

With the angle being 109.5°
tracking img