Source: https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-5-2-formulated-vs-manure-fertilisers [Revision notes](https://senecalearning.com/en-gb/revision-notes.md) › [International A Level](https://senecalearning.com/en-gb/revision-notes/international-a-level.md) › [Chemistry](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry.md) › [Cambridge International](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international.md) › Formulated vs Manure Fertilisers # Formulated vs Manure Fertilisers Chemistry: Cambridge International A Level, topic 2.5.2 ## NPK Fertilisers Nitrogen (N), phosphorus (P), and potassium (K) are all essential elements for plant growth. Harvesting crops may mean that there isn't enough of these elements in the soil. Fertilisers can help to top up these nutrients. ### Increase agricultural productivity ![Increase agricultural productivity](https://image-v2.cdn.app.senecalearning.com/courseImages/chemistry/10.4.2%20NPK%20fertilisers/farmers-market-1329008_640-min.jpg) - Fertilisers increase the amount of essential nutrients present in the soil. This results in an increase in agricultural productivity. ### Contain NPK salts ![Contain NPK salts](https://image-v2.cdn.app.senecalearning.com/courseImages/chemistry/10.4.2%20NPK%20fertilisers/salt-1884166_640.jpg) - NPK fertilisers contain salts of the three essential elements in carefully controlled percentages. ## Manure vs Formulated Fertilisers Traditionally, nitrogen, potassium and phosphorus were added to the soil using manure fertilisers. Today, farmers often use formulated fertilisers, which have the following advantages: ### Better availability ![Better availability](https://image-v2.cdn.app.senecalearning.com/courseImages/chemistry/10.4.2%20NPK%20fertilisers/profits-1953616_640-min.jpg) ### Not as complex to use ![Not as complex to use](https://image-v2.cdn.app.senecalearning.com/courseImages/chemistry/10.4.2%20NPK%20fertilisers/thumbs-up-2766247_640-min.jpg) ### Odourless ![Odourless](https://image-v2.cdn.app.senecalearning.com/courseImages/chemistry/10.4.2%20NPK%20fertilisers/perfume-min.jpg) ### Can be customised ![Can be customised](https://image-v2.cdn.app.senecalearning.com/courseImages/chemistry/10.4.2%20NPK%20fertilisers/scissors-1008908_640-min.jpg) - The relative percentages of each component can be tailored to different scenarios. ## Test yourself on Formulated vs Manure Fertilisers - What elements are essential for the success of plants? - Why might a farmer need to add fertiliser to a field after harvesting a crop? - What elements are found in NPK fertilisers? - What type of fertiliser should a farmer use if a crop needs a specific ratio of nitrogen, phosphorus and potassium? - How were the essential elements for plant growth traditionally added to soil? [Practise this topic for free](https://app.senecalearning.com/classroom/course/2eb3e96b-13a1-48db-b631-5d0098e3ed27/section/32c0f583-36dc-4917-a41b-cd93b8f75d1a/session) - Previous topic: [2.5.1 Nitrogen & Ammonia](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-5-1-nitrogen-and-ammonia.md) - Next topic: [2.5.3 Nitrogen Containing Fertilisers](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-5-3-nitrogen-containing-fertilisers.md) ## Chemistry: Cambridge International A Level contents ### 1 Physical Chemistry - 1.1 Atoms, Molecules & Stoichiometry - [1.1.1 Relative Masses](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-1-1-relative-masses.md) - [1.1.2 The Mole](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-1-2-the-mole.md) - [1.1.3 Mass Spectrometry](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-1-3-mass-spectrometry.md) - [1.1.4 Empirical & Molecular Formulae](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-1-4-empirical-and-molecular-formulae.md) - [1.1.5 Balanced Equations](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-1-5-balanced-equations.md) - [1.1.6 Molar Volume](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-1-6-molar-volume.md) - [1.1.7 End of Topic Test - Amount of Substance](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-1-7-end-of-topic-test-amount-of-substance.md) - 1.2 Atomic Structure - [1.2.1 Fundamental Particles](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-1-fundamental-particles.md) - [1.2.2 Isotopes & Mass Number](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-2-isotopes-and-mass-number.md) - [1.2.3 Electron Shells, Sub-Shells & Orbitals](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-3-electron-shells-sub-shells-and-orbitals.md) - [1.2.4 Electron Configuration](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-4-electron-configuration.md) - [1.2.5 Ionisation Energy](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-5-ionisation-energy.md) - [1.2.6 Factors Affecting Ionisation Energies](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-6-factors-affecting-ionisation-energies.md) - [1.2.7 Trends of Ionisation](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-7-trends-of-ionisation.md) - [1.2.8 Specific Impacts on Ionisation Energies](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-8-specific-impacts-on-ionisation-energies.md) - [1.2.9 Electron Affinity](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-9-electron-affinity.md) - [1.2.10 End of Topic Test - Atomic Structure](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-10-end-of-topic-test-atomic-structure.md) - [1.2.11 A-A* (AO2/3) - Atomic Structure](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-2-11-a-a-ao23-atomic-structure.md) - 1.3 Chemical Bonding - [1.3.1 Ionic Bonding](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-1-ionic-bonding.md) - [1.3.2 Covalent & Dative Bonding](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-2-covalent-and-dative-bonding.md) - [1.3.3 Shapes of Molecules](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-3-shapes-of-molecules.md) - [1.3.4 Intermolecular Forces](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-4-intermolecular-forces.md) - [1.3.5 Intermolecular Forces 2](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-5-intermolecular-forces-2.md) - [1.3.6 Electronegativity](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-6-electronegativity.md) - [1.3.7 Bond Length, Bond Energy, & Bond Polarity](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-7-bond-length-bond-energy-and-bond-polarity.md) - [1.3.8 Metallic Bonding](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-8-metallic-bonding.md) - [1.3.9 Physical Properties](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-9-physical-properties.md) - [1.3.10 End of Topic Test - Bonding](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-10-end-of-topic-test-bonding.md) - [1.3.11 A-A* (AO2/3) - Bonding](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-3-11-a-a-ao23-bonding.md) - 1.4 States of Matter - [1.4.1 Simple Covalent Molecules](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-4-1-simple-covalent-molecules.md) - [1.4.2 The Ideal Gas Equation](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-4-2-the-ideal-gas-equation.md) - [1.4.3 States of Matter](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-4-3-states-of-matter.md) - [1.4.4 Particle Diagrams](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-4-4-particle-diagrams.md) - [1.4.5 The Liquid State](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-4-5-the-liquid-state.md) - [1.4.6 Giant Ionic Lattices](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-4-6-giant-ionic-lattices.md) - [1.4.7 Giant Metallic Lattices](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-4-7-giant-metallic-lattices.md) - [1.4.8 Giant Covalent Structures](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-4-8-giant-covalent-structures.md) - [1.4.9 Graphene & Fullerene](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-4-9-graphene-and-fullerene.md) - [1.4.10 Recycling](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-4-10-recycling.md) - 1.5 Chemical Energetics - [1.5.1 Calorimetry](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-5-1-calorimetry.md) - [1.5.2 Bond Enthalpies](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-5-2-bond-enthalpies.md) - [1.5.3 Enthalpy Changes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-5-3-enthalpy-changes.md) - [1.5.4 Hess' Law](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-5-4-hess-law.md) - [1.5.5 Born-Haber Cycles](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-5-5-born-haber-cycles.md) - [1.5.6 Born-Haber Cycle Calculations](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-5-6-born-haber-cycle-calculations.md) - [1.5.7 Entropy](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-5-7-entropy.md) - [1.5.8 Free Energy](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-5-8-free-energy.md) - [1.5.9 End of Topic Test - Energetics](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-5-9-end-of-topic-test-energetics.md) - 1.6 Electrochemistry - [1.6.1 Electrochemical Cells](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-6-1-electrochemical-cells.md) - [1.6.2 Electrochemical Series](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-6-2-electrochemical-series.md) - [1.6.3 Commercial Application](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-6-3-commercial-application.md) - [1.6.4 Nernst Equation](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-6-4-nernst-equation.md) - [1.6.5 Redox](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-6-5-redox.md) - 1.7 Equilibria - [1.7.1 Dynamic Equilibrium & Le Chatelier](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-1-dynamic-equilibrium-and-le-chatelier.md) - [1.7.2 Kc](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-2-kc.md) - [1.7.3 Kp](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-3-kp.md) - [1.7.4 pH](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-4-ph.md) - [1.7.5 The Ionic Product of Water](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-5-the-ionic-product-of-water.md) - [1.7.6 Weak Acids & Bases](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-6-weak-acids-and-bases.md) - [1.7.7 Introduction to Solubility Equilibria](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-7-introduction-to-solubility-equilibria.md) - [1.7.8 Solubility Equilibria Calculations](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-8-solubility-equilibria-calculations.md) - [1.7.9 Free Energy of Dissolution](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-9-free-energy-of-dissolution.md) - [1.7.10 pH and Solubility](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-10-ph-and-solubility.md) - [1.7.11 Common-Ion Effect](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-11-common-ion-effect.md) - [1.7.12 End of Topic Test - Kp & Electrochemistry](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-12-end-of-topic-test-kp-and-electrochemistry.md) - [1.7.13 A-A* (AO2/3) - Electrochemical Cells](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-7-13-a-a-ao23-electrochemical-cells.md) - 1.8 Partition Coefficient - [1.8.1 Kpc](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-8-1-kpc.md) - 1.9 Reaction Kinetics - [1.9.1 Collision Theory](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-1-collision-theory.md) - [1.9.2 Orders, Rate Constants & Equations](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-2-orders-rate-constants-and-equations.md) - [1.9.3 Rate Graphs](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-3-rate-graphs.md) - [1.9.4 Rate Determining Step](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-4-rate-determining-step.md) - [1.9.5 Maxwell-Boltzmann Distribution](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-5-maxwell-boltzmann-distribution.md) - [1.9.6 Catalysts](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-6-catalysts.md) - [1.9.7 Homogeneous Catalysts](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-7-homogeneous-catalysts.md) - [1.9.8 Heterogeneous Catalysts](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-8-heterogeneous-catalysts.md) - [1.9.9 End of Topic Test - Kinetics](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-9-end-of-topic-test-kinetics.md) - [1.9.10 End of Topic Test - Rate Equations](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-10-end-of-topic-test-rate-equations.md) - [1.9.11 A-A* (AO2/3) - Rate Equations](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/1-9-11-a-a-ao23-rate-equations.md) ### 2 Inorganic Chemistry - 2.1 The Periodic Table - [2.1.1 The Periodic Table](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-1-1-the-periodic-table.md) - [2.1.2 Trends in the Periodic Table](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-1-2-trends-in-the-periodic-table.md) - [2.1.3 End of Topic Test - Periodicity & Trends](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-1-3-end-of-topic-test-periodicity-and-trends.md) - [2.1.4 Ceramics](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-1-4-ceramics.md) - [2.1.5 Period 3 Elements & Oxides](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-1-5-period-3-elements-and-oxides.md) - [2.1.6 Period 3 Oxides](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-1-6-period-3-oxides.md) - [2.1.7 End of Topic Test - Period 3](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-1-7-end-of-topic-test-period-3.md) - 2.2 Group 2 - [2.2.1 Group 2 Chemistry](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-2-1-group-2-chemistry.md) - 2.3 Group 17 - [2.3.1 Introduction to Halogens](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-3-1-introduction-to-halogens.md) - [2.3.2 Reactions of Halogens](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-3-2-reactions-of-halogens.md) - [2.3.3 Chlorine & Chlorate(I)](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-3-3-chlorine-and-chloratei.md) - [2.3.4 End of Topic Test - Group 17](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-3-4-end-of-topic-test-group-17.md) - [2.3.5 A-A* (AO2/3) - Periodicity, Group 2 & 17](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-3-5-a-a-ao23-periodicity-group-2-and-17.md) - 2.4 Transition Metals - [2.4.1 General Properties](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-1-general-properties.md) - [2.4.2 Titrations](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-2-titrations.md) - [2.4.3 Shapes of Complex Ions](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-3-shapes-of-complex-ions.md) - [2.4.4 Variable Oxidation States](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-4-variable-oxidation-states.md) - [2.4.5 Ligands](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-5-ligands.md) - [2.4.6 Colours of Ions](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-6-colours-of-ions.md) - [2.4.7 Stereoisomerism of Complex Ions](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-7-stereoisomerism-of-complex-ions.md) - [2.4.8 Cisplatin](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-8-cisplatin.md) - [2.4.9 Ligand Substitutions & Kstab](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-9-ligand-substitutions-and-kstab.md) - [2.4.10 End of Topic Test - Transition Metals](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-10-end-of-topic-test-transition-metals.md) - [2.4.11 A-A* (AO2/3) - Transition Metals](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-4-11-a-a-ao23-transition-metals.md) - 2.5 Nitrogen & Sulfur - [2.5.1 Nitrogen & Ammonia](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-5-1-nitrogen-and-ammonia.md) - [2.5.2 Formulated vs Manure Fertilisers](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-5-2-formulated-vs-manure-fertilisers.md) - [2.5.3 Nitrogen Containing Fertilisers](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-5-3-nitrogen-containing-fertilisers.md) - [2.5.4 Fertilizers & Eutrophication](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-5-4-fertilizers-and-eutrophication.md) - [2.5.5 Common Atmospheric Pollutants & Their Properties](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-5-5-common-atmospheric-pollutants-and-their-properties.md) - [2.5.6 Catalytic Converters](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-5-6-catalytic-converters.md) - [2.5.7 Atmospheric Oxides](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/2-5-7-atmospheric-oxides.md) ### 3 Organic Chemistry & Analysis - 3.1 Introduction to Organic Chemistry - [3.1.1 Naming Conventions](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-1-1-naming-conventions.md) - [3.1.2 Mechanism](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-1-2-mechanism.md) - [3.1.3 Isomerism](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-1-3-isomerism.md) - [3.1.4 End of Topic Test - Introduction to Organic Chem](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-1-4-end-of-topic-test-introduction-to-organic-chem.md) - 3.2 Hydrocarbons - [3.2.1 Fractional Distillation](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-1-fractional-distillation.md) - [3.2.2 Cracking](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-2-cracking.md) - [3.2.3 Combustion](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-3-combustion.md) - [3.2.4 Chlorination](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-4-chlorination.md) - [3.2.5 End of Topic Test - Alkanes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-5-end-of-topic-test-alkanes.md) - [3.2.6 Introduction to Alkenes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-6-introduction-to-alkenes.md) - [3.2.7 Reactions of Alkenes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-7-reactions-of-alkenes.md) - [3.2.8 Polymerisation Reactions](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-8-polymerisation-reactions.md) - [3.2.9 End of Topic Test - Alkenes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-9-end-of-topic-test-alkenes.md) - [3.2.10 Arenes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-10-arenes.md) - [3.2.11 Evidence for Structure of Arenes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-11-evidence-for-structure-of-arenes.md) - [3.2.12 Reactions of Benzene](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-12-reactions-of-benzene.md) - [3.2.13 End of Topic Test -Arenes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-2-13-end-of-topic-test-arenes.md) - 3.3 Halogen Derivatives - [3.3.1 Properties of Haloalkanes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-3-1-properties-of-haloalkanes.md) - [3.3.2 Substitution Reactions of Haloalkanes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-3-2-substitution-reactions-of-haloalkanes.md) - [3.3.3 Environmental Impacts of Haloalkanes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-3-3-environmental-impacts-of-haloalkanes.md) - [3.3.4 End of Topic Test - Halogenoalkanes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-3-4-end-of-topic-test-halogenoalkanes.md) - 3.4 Hydroxy Compounds - [3.4.1 Types of Alcohol](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-4-1-types-of-alcohol.md) - [3.4.2 Oxidation 1](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-4-2-oxidation-1.md) - [3.4.3 Oxidation 2](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-4-3-oxidation-2.md) - [3.4.4 Elimination](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-4-4-elimination.md) - [3.4.5 Acids & Esters](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-4-5-acids-and-esters.md) - [3.4.6 Acyl Chlorides & Acylation](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-4-6-acyl-chlorides-and-acylation.md) - [3.4.7 Phenols & Their Reactions](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-4-7-phenols-and-their-reactions.md) - [3.4.8 End of Topic Test - Alcohols](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-4-8-end-of-topic-test-alcohols.md) - 3.5 Carbonyl Compounds - [3.5.1 Carbonyls](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-5-1-carbonyls.md) - [3.5.2 Hydrogen Bonding & Carbonyls](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-5-2-hydrogen-bonding-and-carbonyls.md) - [3.5.3 Aldehydes & Ketones](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-5-3-aldehydes-and-ketones.md) - [3.5.4 Tri-Iodomethane Reaction](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-5-4-tri-iodomethane-reaction.md) - [3.5.5 End of Topic Test -Carbonyls](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-5-5-end-of-topic-test-carbonyls.md) - 3.6 Carboxylic Acids & Derivatives - [3.6.1 Properties of Carboxylic Acids](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-6-1-properties-of-carboxylic-acids.md) - [3.6.2 Esters](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-6-2-esters.md) - [3.6.3 Acyl Chlorides](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-6-3-acyl-chlorides.md) - [3.6.4 End of Topic Test - Carboxylic Acids](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-6-4-end-of-topic-test-carboxylic-acids.md) - 3.7 Nitrogen Compounds - [3.7.1 Nature & Preparation of Amines](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-7-1-nature-and-preparation-of-amines.md) - [3.7.2 Basicity & Nucleophilicity](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-7-2-basicity-and-nucleophilicity.md) - [3.7.3 Amides](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-7-3-amides.md) - [3.7.4 Reactions of Amino Acids](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-7-4-reactions-of-amino-acids.md) - [3.7.5 Amino Acids](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-7-5-amino-acids.md) - 3.8 Polymerisation - [3.8.1 Properties of Addition Polymers](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-8-1-properties-of-addition-polymers.md) - [3.8.2 Condensation Polymerisation](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-8-2-condensation-polymerisation.md) - [3.8.3 Effects of Side-Chains on Polymers](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-8-3-effects-of-side-chains-on-polymers.md) - [3.8.4 Hydrolysis of Ester & Amide Groups](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-8-4-hydrolysis-of-ester-and-amide-groups.md) - [3.8.5 Proteins](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-8-5-proteins.md) - [3.8.6 DNA](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-8-6-dna.md) - [3.8.7 Adhesive & Conducting Polymers](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-8-7-adhesive-and-conducting-polymers.md) - [3.8.8 End of Topic Test - Amines & Proteins](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-8-8-end-of-topic-test-amines-and-proteins.md) - 3.9 Analytical Techniques - [3.9.1 Chromatography](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-1-chromatography.md) - [3.9.2 High-Performance Liquid Chromatography](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-2-high-performance-liquid-chromatography.md) - [3.9.3 Gas Chromatography](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-3-gas-chromatography.md) - [3.9.4 IR Spectroscopy](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-4-ir-spectroscopy.md) - [3.9.5 Uses of IR Spectroscopy](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-5-uses-of-ir-spectroscopy.md) - [3.9.6 Mass Spectrometry](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-6-mass-spectrometry.md) - [3.9.7 Mass Spectrometry Analysis](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-7-mass-spectrometry-analysis.md) - [3.9.8 Nuclear Magnetic Resonance](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-8-nuclear-magnetic-resonance.md) - [3.9.9 Carbon-13 NMR](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-9-carbon-13-nmr.md) - [3.9.10 Proton NMR I](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-10-proton-nmr-i.md) - [3.9.11 Proton NMR II](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-11-proton-nmr-ii.md) - [3.9.12 End of Topic Test - Analytical Techniques](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-12-end-of-topic-test-analytical-techniques.md) - [3.9.13 A-A* (AO2/3) - Analytical Techniques](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-9-13-a-a-ao23-analytical-techniques.md) - 3.10 Organic Synthesis - [3.10.1 Chirality & Drug Synthesis](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-10-1-chirality-and-drug-synthesis.md) - [3.10.2 Organic Synthesis](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-10-2-organic-synthesis.md) - [3.10.3 Examples of Synthetic Routes](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-10-3-examples-of-synthetic-routes.md) - [3.10.4 End of Topic Test - Organic Synthesis](https://senecalearning.com/en-gb/revision-notes/international-a-level/chemistry/cambridge-international/3-10-4-end-of-topic-test-organic-synthesis.md)