GENERAL CHEMISTRY 2 FOR SCIENCE STUDENTS.

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FOREWORDS
This is the first time I wrote a text book of general chemistry 2 for
science students at University Level. This book is intended to help students in
studying chemistry especially those who studying chemistry at undergraduate
levels. This book was written in English in order to help students of bilingual
classes in Medan and around the country. There is a need for writing
chemistry text based on local curriculumn in English so that students would be
able to comprehend the materials presented. Of course, this book is urgently
required, since the State University of Medan has introduced a new class
which is called bilingual classes. This particular graduates are intended to
teach students at senior high school levels, where international schools and

international standard based schools (Sekolah Berstandar International or
SBI) have been introduced recently by Indonesian gevernment at several
senior high schools through out the country. These new programs required
teachers who are capable in teaching subject matters in English, especially
chemistry, physics, biology and mathematics. I hope this book will able to
assit and give contributions to students who studying chemistry at second
semester in Unimed and other universities, since this modul was written as
clear as possible in English.
At last, I would like to thank Rector of Unimed for facilitating,
funding and publishing this book.

Sincerely yours,

Wesly Hutabarat

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CONTENTS

Forewords


i

Contents

ii

Figures

ix

Tables

xi

CHAPTER 1. EQUILIBRIUM

1

1.1.


Calculating Formula Masses

3

1.2.

Shift in Equilibrium

3

1.3.

The Equilibrium Constant

4

1.4.

The Equilibrium Constant, Kp and Kc


6

1.5.

Magnitudes of K Values

8

1.6.

Equilibrioum Quation, Q

9

1.7.

Initial-Change-Equilibrium (I-C-E) Charts

9


1.8.

Acid-Base Equilibrium

10

1.9.

Acid Dissociation Xconstant

11

1.10. Base Dissociation Constant

11

1.11. Ion Product Constant

12


1.12. Conjugate Base expressions

12

CHAPTER 2. SOLUTION

15

2.1

15

Solution

2.1.1. Percentage

15

2.1.2. Mole Fraction


17

2.1.3. Molarity (Formality)

20

2.1.4. Molality

21

2.1.5. Normality

22

2.1.6. Osmolarity

22

2.1.7. Ionic Strength


23

2.2.

25

Acid-Base Reaction

2.2.1. Tradition Theories

26

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2.2.2. Arrhenius Theory

27

2.2.3. Bronsted-Lowry Theory


27

2.2.4. Lewis Acids- and Bases

28

2.2.5. Water

29

2.3.

Oxidation-Reduction Reactions

30

2.3.1. Acids and Bases Ionization Constant

32


2.3.2. Calculation Percentage Composition From Formulas

32

2.4.

Determination of Formulas from Percentage
Composition Data

35

2.4.1. Using Percentage Composition

36

2.5.

Calculating Molecular Formula


37

2.6.

Nomenclatur of Acids & Bases

38

2.7.

Strong and Weak Acids and Bases

38

2.7.1. Properties of Acids and Bases

39

2.8.

41

Physical Properties

2.8.1. Colligative Properties of solutions

41

2.8.2. Vapor Pressures

42

2.8.3. Boiling Point Elevation

43

2.8.4. Freezing Point Depression

44

2.8.5. Osmosis

44

2.9.

45

Neutralization

CHAPTER 3. REDOX REACTION AND
ELECTROCHEMISTRY
3.1.

Redox Reactions

47
48

3.1.1. Balancing Oxidation-Reduction Equations

49

3.1.2. Ion-Electron Half-reaction Method

50

3.1.3. Balancing from Oxidation Number Changes

53

3.1.4. Balancing Halt-reaction by the Change

3.2.

in Oxidation Number Method

55

Electronegativity

57

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3.2.1. Electrode Potentials
3.2.3. Effect of pH on E

58

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4.2.4. Fission and Fusion

93

4.2.5. Fusion

95

4.3. Application of Radioactive Isotopes in
Chemistry and Biology

95

4.3.1. Radiocarbon Dating

96

4.3.2. Radioactivity

98

4.4.

Uranium Deposits in Sedimentary Rock

100

4.4.1. Radioactive Waste

102

4.4.1.1. The Nature and Significance of Radioactive Waste

102

4.4.2. Pharmacokinetics

104

4.4.2.1. Sources of waste

105

4.4.2.2. Radiation Poisoning

111

4.4.2.3. Radioactive Pollution

111

4.4.2.4. Sign and Symptoms

112

4.4.2.5. Cutaneous Radioactive Syndrome

113

4.4.2.6. Exposure Levels

113

4.4.2.7. External vs Internal exposure

115

4.4.2.8. Nuclear Warfare and Bomb Tests

115

4.4.2.9. Nuclear Reactor Accidents

116

4.4.2.10. Ingestion and Inhalation

116

4.4.2.11. Hazards

117

4.4.2.12. Low Level Contamination

117

4.4.2.13. High Level Contamination

118

4.4.3.

118

The Main Source of Nuclear Energy

4.4.3.1. Element Plutonium-Pu

118

4.4.3.2. Plutonium Reactions

118

4.4.3.3. Uranium -238

119

4.4.3.4. Nuclear Energy Applications

120

4.4.3.5. Breeder Reactors

120

4.4.3.6. Radiation Shielding

120

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4.4.3.7. Downblending

121

4.4.3.8. Nuclear Weapons

121

4.4.3.9. Radioactive and Decay

123

4.4.3.10. Radium Series

123

CHAPTER 5. ORGANIC CHEMISTRY

128

5.1.

128

Hydrocarbon

5.1.1. Homolog Series

129

5.1.2. Types of Formula

129

5.2.

130

Bonding in Alkane

5.2.1. Mthane, CH4

131

5.2.2. Promotion of an Electron

132

5.3.

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Ethane, C2H6

5.3.1. Free Rotation of Carbon-Carbon Single Bond

134

5.3.2. Other Alkanes

135

5.3.3.1. Alkanes: Simple- Chain

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5.3.3.2. Strutural Isomerism

136

5.3.3.3. Alkanes: Branched-Chains

136

5.3.3.4. Cycloalkanes

138

5.3.3.4.1. Substituted Cycloalkanes

138

5.3.3.4.2. Reactions of Alkanes

138

5.4.

139

Molecular Shape

5.4.1. The Formation of Single Covalent Bonds

139

5.4.2. Lone Electron Pairs

141

5.4.3. Linear and Planar Shapes

142

5.4.3.1. Electron-Poor Atoms

142

5.4.3.2. Five and Six Groups

143

5.5.

144

Alkenes

5.5.1. Structure

144

5.5.2. Naming Alkenes

145

5.5.3. Physical Properties

146

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5.5.4. Isomerism

146

5.5.5. EZ Notation

147

5.5.6. Alkenes Formation

150

5.5.6.1. Thermal Decomposition of Alkanes

150

5.5.6.2. Hydrogenation of Alkynes

150

5.5.6.3. Reaction of Halogenated Derivatives with Zinc Metal

151

5.5.6.4. Dehydrogenation of Mono-Halogenated Derivatives

151

5.5.6.5. Dehydration of Alcohols

152

5.6.6.6. Synthesis of Alkene by Dehydration of an Alcohol

152

5.5.6.7. Wittig Reaction

153

5.6.

153

Reaction of Alkenes

5.6.1. Hydrogen Addition or Hydrogenation

153

5.6.2. X2 addition or Halogenations

153

5.6.3. HX Addition

154

5.6.4. H2O Addition

154

5.6.5. HBr Addition in the Presence of Peroxides

154

5.7. Test for Unsaturation

155

5.7.1. Reduction with Hydrogen

155

5.7.2. Reaction with Hydrogen Bromide

155

5.7.3. Poly (ethene)

156

5.7.4. Poly (propene)

156

5.7.5. Poly (chloroethene) PVC

157

5.7.6. Poly(fluoroethene)

157

5.8.

157

Alcohols

5.8.1. The Fractional Group and its Test

158

5.8.2. Reactions of Alcohols

158

5.9.

Types of Alcohol

159

5.10. Aldehydes and Ketones

159

5.10.1.General Formula

159

5.11. Carboxylic Acids

160

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5.11.1. The Relationship between Alcohols,
Aldehydes, Ketones, and Carboxylic Acids

160

5.12. Cycloalkenes

161

5.13. Alkynes

162

CHAPTER 6. BIOCHEMISTRY

164

6.1.

165

Amino Acids and Proteins

6.1.1. Amino Acids

165

6.1.2. Recommended Daily Intake

168

6.1.3. Use of Essential Amino Acids

169

6.2.

171

Fatty Acids

6.2.1. Functions

171

6.3.

Vitamin A

172

6.4.

Thiamine

173

CHAPTER 7. REACTION RATES

174

7.1. Introduction

174

7.2. Rate of Equation

175

7.3. Zeroth Order Reactions

175

7.4. First-order Reactions

177

7.5. Second-order Equations

180

7.6. The Activation Energy

184

7.7. Collision Theory of Reaction Rates

187

LITERATURE

189

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Figures

Figure 3.1. pH Meter
Figure 3.2. Daniel

63

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Figure 5.2. Electronic Configuration

131

Figure 5.3. Electron Promotion

132

Figure. 5.4. Sp3 Hybrization

132

Figure 5.5. Covalent Bonding in Methane Molecules

134

Figure 5.6. Bonding Orbital in Ethane Molecules

134

Figure 5.7. Sigma Bond in Ethane Molecules

134

Figure 5.8. Ethane molecules

134

Figure. 5. 9.Line Structure of 2-Methyl and Hexane

136

Figure 5.10. Hybrid Orbital of Methane

139

Figure. 5.11. Methane 3D Structure

140

Figure 5.12. CH4 is Tetrahedral Molecules

141

Figure 5.13. The Lone Pair Electron of Ammonia

142

Figure 5.14. Linear Shape in Carbon Dioxides

143

Figure 5.15. Bending Shape in Sulfur Dioxides

143

Figure 3.16. Three Dimension Shape-3D

144

Figure 5.17. Cis-Trans But-2-ene

146

Figure 5.18. E-Z -3-methylpent-2-ene

149

Figure 5.1.9. Comparison of E-Z with Cis-Trans

149

Figure 5.20. Diagram for Isomers, Constitutional
Isomers and Steroisomers

163

Figure 6.1. Essential vs. Conditional Essentiality Amino Acids

167

Figure 7.1. Zeroth Order Reaction

176

Figure 7.2. First Order Reaction

179

Figure 7.3. Second Order Reactions

182

Figure 7.4. Variations of Enthalpy in a Reaction

185

Figure 7.5. Collision Diameter of Molecules

185

Figure 7.6. Different Directions for Two Colliding Molecules

186

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Tables

Table.1.1. Q Values Compared with K

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Table 1.2. I-C-E Chart

10

Table 2.1. Ionic Strength of Some Compounds

24

Table 3.1. The Common Oxidation Number of Some Elements

49

Table 3.2. Oxidation State Changes of Iron and Chlorate

56

Table 3.3. Potential Electrode of Half-Reactions

59

Table 3.4. Increasing Strength of Oxidizing and Reducing Agents

71

Table 3.5. Standard Reduction Potential Eo for Half-cells
at 298.15 K (pH=0)

72

Table 4.1. Masses of Some Fundamental Particles

91

Table 4.2. Shows the Uranium Series of Radioactive
Decays of 29892U to

206

82Pb.

93

Table 4.3. Binding Energy of Isotopes

94

Table 4.4. Isotopes Used in Chemistry and Biology

96

Table 4.5. Long Lived Fision Products of Tc Series

103

Table 4.6. Medium Lived Fission Products of Eu-155 Series

103

Table 4.7. Uranium Grades in ppm

104

Table 4.8. Fissions Products of Actinides Series

104

Table. 4.9. The Most Stable Isotopes of Uranium-232

107

Table 4.10.Toxicity of Uranium Radiations

110

Table 4.11. Radiation Symptons after Exposuring
to Radioactive Radiation

114

Table 4.12. Uranium-238 Characteristics

119

Table 4.13. Uranium Ores

123

Table 4.14. Uranium-238 Decaying Products

124

Table 4.15. Uranium Isotopes

125

Table 4.16. The Most Stable Isotopes of Plutonium

125

Table 5.1.

129

Bond Energy

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Table 5.2. Prefix for Naming Alkanes

135

Table 5.3. Orbital Geometries

141

Table 5.4. Naming Alcohols

157

Table 5.5. Formula and Nomenclature of Aldehydes and Ketones

159

Table 5.6. Naming Carxyclic Acids

160

Table 5.7. Common Functional Groups

163

Table 6.1. Essentials vs Conditional Essentiality amino Acids

167

Table 6.2. Essential Amino Acids Daily Intake.

169

Table 6.3. General Source of Protein Intake for Everyday

170

Table 7.1. Reaction Rate Equations

183