Chemistry_Grade_10-12 (1).pdf

62 polar ionic the nature of the ionic bond 74

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4.6.2 Polar molecules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.7 Ionic Bonding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 4.7.1 The nature of the ionic bond . . . . . . . . . . . . . . . . . . . . . . . . 74 4.7.2 The crystal lattice structure of ionic compounds . . . . . . . . . . . . . . 76 4.7.3 Properties of Ionic Compounds . . . . . . . . . . . . . . . . . . . . . . . 76 4.8 Metallic bonds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 4.8.1 The nature of the metallic bond . . . . . . . . . . . . . . . . . . . . . . 76 4.8.2 The properties of metals . . . . . . . . . . . . . . . . . . . . . . . . . . 77 vi
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CONTENTS CONTENTS 4.9 Writing chemical formulae . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 4.9.1 The formulae of covalent compounds . . . . . . . . . . . . . . . . . . . . 78 4.9.2 The formulae of ionic compounds . . . . . . . . . . . . . . . . . . . . . 80 4.10 The Shape of Molecules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 4.10.1 Valence Shell Electron Pair Repulsion (VSEPR) theory . . . . . . . . . . 82 4.10.2 Determining the shape of a molecule . . . . . . . . . . . . . . . . . . . . 82 4.11 Oxidation numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 4.12 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 5 Intermolecular Forces - Grade 11 91 5.1 Types of Intermolecular Forces . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 5.2 Understanding intermolecular forces . . . . . . . . . . . . . . . . . . . . . . . . 94 5.3 Intermolecular forces in liquids . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 5.4 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 6 Solutions and solubility - Grade 11 101 6.1 Types of solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 6.2 Forces and solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 6.3 Solubility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 6.4 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 7 Atomic Nuclei - Grade 11 107 7.1 Nuclear structure and stability . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 7.2 The Discovery of Radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 7.3 Radioactivity and Types of Radiation . . . . . . . . . . . . . . . . . . . . . . . . 108 7.3.1 Alpha ( α ) particles and alpha decay . . . . . . . . . . . . . . . . . . . . 109 7.3.2 Beta ( β ) particles and beta decay . . . . . . . . . . . . . . . . . . . . . 109 7.3.3 Gamma ( γ ) rays and gamma decay . . . . . . . . . . . . . . . . . . . . . 110 7.4 Sources of radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 7.4.1 Natural background radiation . . . . . . . . . . . . . . . . . . . . . . . . 112 7.4.2 Man-made sources of radiation . . . . . . . . . . . . . . . . . . . . . . . 113 7.5 The ’half-life’ of an element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 7.6 The Dangers of Radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 7.7 The Uses of Radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 7.8 Nuclear Fission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 7.8.1 The Atomic bomb - an abuse of nuclear fission . . . . . . . . . . . . . . 119 7.8.2 Nuclear power - harnessing energy . . . . . . . . . . . . . . . . . . . . . 120 7.9 Nuclear Fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 7.10 Nucleosynthesis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 7.10.1 Age of Nucleosynthesis (225 s - 10 3 s) . . . . . . . . . . . . . . . . . . . 121 7.10.2 Age of Ions ( 10 3 s - 10 13 s) . . . . . . . . . . . . . . . . . . . . . . . . . 122 7.10.3 Age of Atoms ( 10 13 s - 10 15 s) . . . . . . . . . . . . . . . . . . . . . . . 122 7.10.4 Age of Stars and Galaxies (the universe today) . . . . . . . . . . . . . . 122 7.11 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 vii
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CONTENTS CONTENTS 8 Thermal Properties and Ideal Gases - Grade 11 125 8.1 A review of the kinetic theory of matter . . . . . . . . . . . . . . . . . . . . . . 125 8.2 Boyle’s Law: Pressure and volume of an enclosed gas . . . . . . . . . . . . . . . 126 8.3 Charles’s Law: Volume and Temperature of an enclosed gas . . . . . . . . . . . 132 8.4 The relationship between temperature and pressure . . . . . . . . . . . . . . . . 136 8.5 The general gas equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 8.6 The ideal gas equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 8.7 Molar volume of gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 8.8 Ideal gases and non-ideal gas behaviour . . . . . . . . . . . . . . . . . . . . . . 146 8.9 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 9 Organic Molecules - Grade 12 151 9.1 What is organic chemistry? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 9.2 Sources of carbon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 9.3 Unique properties of carbon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 9.4 Representing organic compounds . . . . . . . . . . . . . . . . . . . . . . . . . . 152 9.4.1 Molecular formula . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 9.4.2 Structural formula . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 9.4.3 Condensed structural formula . . . . . . . . . . . . . . . . . . . . . . . . 153 9.5 Isomerism in organic compounds . . . . . . . . . . . . . . . . . . . . . . . . . . 154 9.6 Functional groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 9.7 The Hydrocarbons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 9.7.1 The Alkanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 9.7.2 Naming the alkanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159 9.7.3 Properties of the alkanes . . . . . . . . . . . . . . . . . . . . . . . . . . 163 9.7.4 Reactions of the alkanes . . . . . . . . . . . . . . . . . . . . . . . . . . 163 9.7.5 The alkenes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 9.7.6 Naming the alkenes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 9.7.7 The properties of the alkenes . . . . . . . . . . . . . . . . . . . . . . . . 169 9.7.8 Reactions of the alkenes . . . . . . . . . . . . . . . . . . . . . . . . . . 169 9.7.9 The Alkynes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171 9.7.10 Naming the alkynes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171 9.8 The Alcohols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 9.8.1 Naming the alcohols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 9.8.2 Physical and chemical properties of the alcohols . . . . . . . . . . . . . . 175 9.9 Carboxylic Acids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176 9.9.1 Physical Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177 9.9.2 Derivatives of carboxylic acids: The esters . . . . . . . . . . . . . . . . . 178 9.10 The Amino Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 9.11 The Carbonyl Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 9.12 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 viii
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CONTENTS CONTENTS 10 Organic Macromolecules - Grade 12 185 10.1 Polymers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185 10.2 How do polymers form? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186 10.2.1 Addition polymerisation . . . . . . . . . . . . . . . . . . . . . . . . . . . 186 10.2.2 Condensation polymerisation . . . . . . . . . . . . . . . . . . . . . . . . 188 10.3 The chemical properties of polymers
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