OCR A-level Chemistry Revision Notes
Our OCR A-Level Chemistry revision notes have been split into categories to make it easy to dive into the topics you feel you need to revise. Covering all topics, these bite-sized revision notes include simple explanations and images to make it easier to digest even the trickiest of concepts.
OCR 2.1.1 Atomic structure and Isotopes
OCR 2.1.2 Compounds, Formulae and Equations
OCR 2.1.3 Amount of Substance
Amount of Substance – Percentage Atom Economy (A-Level Chemistry)
Amount of Substance – Calculating Percentage Yields (A-Level Chemistry)
Amount of Substance – Empirical and Molecular Formulae (A-Level Chemistry)
Amount of Substance – Further Mole Calculations (A-Level Chemistry)
Amount of Substance- The Mole and The Avogadro Constant (A-Level Chemistry)
Amount of Substance – The Ideal Gas Equation (A-Level Chemistry)
OCR 2.1.4 Acids
OCR 2.1.5 Redox
OCR 2.2.1 Electron structure
OCR 2.2.2 Bonding and Structure
Bonding – Hydrogen Bonding in Water (A-Level Chemistry)
Bonding – Forces Between Molecules (A-Level Chemistry)
Bonding – Bond Polarity (A-Level Chemistry)
Bonding – Molecular Shapes (A-Level Chemistry)
Bonding – Properties of Covalent Structures (A-Level Chemistry)
Bonding – Covalent Bonds (A-Level Chemistry)
Bonding – Properties of Ionic Bonding (A-Level Chemistry)
OCR 3.1.1 Periodicity
OCR 3.1.2 Group 2
OCR 3.1.3 The Halogens
OCR 3.1.4 Qualitative analysis
OCR 3.2.2 Reaction rates
OCR 3.2.3 Chemical equilibrium
OCR 4.1.1 Basic Concepts of Organic Chemistry
Introduction to Organic Chemistry – Structural Isomers (A-Level Chemistry)
Introduction to Organic Chemistry – Reaction Mechanisms in Organic Chemistry (A-Level Chemistry)
Introduction to Organic Chemistry – General Formulae (A-Level Chemistry)
Introduction to Organic Chemistry – Introduction to Functional Groups (A-Level Chemistry)
Introduction to Organic Chemistry – Naming and Representing Organic Compounds (A-Level Chemistry)
OCR 4.1.2 Alkanes
OCR 4.1.3 Alkenes
OCR 4.2.1 Alcohols
OCR 4.2.2 Haloalkanes
OCR 4.2.3 Organic synthesis
OCR 4.2.4 Analytical techniques
OCR 5.1.1 Rates, Equilibrium and pH
Rate Equations – Reaction Determining Steps (A-Level Chemistry)
Rate Equations – Reaction Half Lives (A-Level Chemistry)
Rate Equations – Uses of Clock Reactions (A-Level Chemistry)
Rate Equations – Determining Orders of Reactions Graphically (A-Level Chemistry)
Rate Equations – Determining Order of Reaction Experimentally (A-Level Chemistry)
Rate Equations – Temperature Changes and the Rate Constant (A-Level Chemistry)
Rate Equations – The Rate Constant (A-Level Chemistry)
Rate Equations – Introduction to Orders of Reactions (A-Level Chemistry)
Rate Equations – The Rate Equation (A-Level Chemistry)
OCR 5.1.2 How fast?
Equilibrium Constant for Homogenous Systems – Le Chatelierās Principle in Gas Equilibria (A-Level Chemistry)
Equilibrium Constant for Homogenous Systems – Gas Equilibria and Kp (A-Level Chemistry)
Equilibrium Constant for Homogeneous System – Changing Kp (A-Level Chemistry)
Equilibrium Constant for Homogenous Systems – Gas Partial Pressures (A-Level Chemistry)
Calculations with Equilibrium Constants (A-Level Chemistry)
Chemical Equilibria applied to Industry (A-Level Chemistry)
Chemical Equilibria and Le Chatelier’s Principle (A-Level Chemistry)
OCR 5.1.3 Acids, Bases and Buffers
Acids and Bases – Acid-Base Indicators (A-Level Chemistry)
Acids and Bases – Titrations (A-Level Chemistry)
Acids and Bases – Buffer Action (A-Level Chemistry)
Acids and Bases – Dilutions and pH (A-Level Chemistry)
Acids and Bases – pH of Strong Bases (A-Level Chemistry)
Acids and Bases – Ionic Product of Water (A-Level Chemistry)
Acids and Bases – More Ka Calculations (A-Level Chemistry)
Acids and Bases – The Acid Dissociation Constant, Ka (A-Level Chemistry)
Acids and Bases – The pH Scale and Strong Acids (A-Level Chemistry)
Acids and Bases – Neutralisation Reactions (A-Level Chemistry)
OCR 5.2.1 Lattice enthalpy
Thermodynamic – Calculating Enthalpy Changes of Solution (A-Level Chemistry)
Thermodynamic – Enthalpy of Solution (A-Level Chemistry)
Thermodynamic – Calculations involving Born-Haber Cycles (A-Level Chemistry)
Thermodynamic – Construction of Born-Haber Cycles (A-Level Chemistry)
Thermodynamic – Enthalpy Key Terms (A-Level Chemistry)
Thermodynamic – Lattice Enthalpies (A-Level Chemistry)
OCR 5.2.2 Enthalpy and Entropy
OCR 5.2.3 Redox and Electrode potentials
Transition Metals – Examples of Redox Reactions in Transition Metals (A-Level Chemistry)
Transition Metals – Iodine-Sodium Thiosulfate Titrations (A-Level Chemistry)
Transition Metals – Carrying Titrations with Potassium Permanganate (A-Level Chemistry)
Transition Metals – Redox Titrations (A-Level Chemistry)
Transition Metals – Redox Potentials (A-Level Chemistry)
Transition Metals – Redox Reactions Revisited (A-Level Chemistry)
Acids and Bases – Acid-Base Indicators (A-Level Chemistry)
Electrode Potentials and Electrochemical Cells – Commercial Applications of Fuel Cells (A-Level Chemistry)
Electrode Potentials and Electrochemical Cells – Electrochemical Cells Reactions (A-Level Chemistry)
Electrode Potentials and Electrochemical Cells – Electrode Potentials (A-Level Chemistry)
OCR 5.3.1 Transition elements
Precipitation Reactions of Metal Ions in Solution (A-Level Chemistry)
Transition Metals – Iodine-Sodium Thiosulfate Titrations (A-Level Chemistry)
Transition Metals – Carrying Titrations with Potassium Permanganate (A-Level Chemistry)
Transition Metals – Redox Titrations (A-Level Chemistry)
Transition Metals – Ligand Substitution Reactions (A-Level Chemistry)
Transition Metals – Colour in Transition Metal Ions (A-Level Chemistry)
Transition Metals – Optical Isomerism in Complex Ions (A-Level Chemistry)
Transition Metals – Cis-Trans Isomerism in Complex Ions (A-Level Chemistry)
Transition Metals – Complex Ion Shape (A-Level Chemistry)
Transition Metals – Ligands (A-Level Chemistry)
OCR 5.3.2 Qualitative analysis
OCR 6.1.1 Aromatic compounds
Aromatic Chemistry – Reactivity of Substituted Benzene (A-Level Chemistry)
Aromatic Chemistry – Friedel-Crafts Acylation and Alkylation (A-Level Chemistry)
Aromatic Chemistry – Halogenation Reactions in Benzene (A-Level Chemistry)
Aromatic Chemistry – Electrophilic Substitution Reactions in Benzene (A-Level Chemistry)
Aromatic Chemistry – Benzene Nomenclature (A-Level Chemistry)
Aromatic Chemistry – Improved Benzene Model (A-Level Chemistry)
Aromatic Chemistry – Introduction to Benzene (A-Level Chemistry)
OCR 6.1.2 Carbonyl compounds
OCR 6.1.3 Carboxylic acids and Esters
OCR 6.2.1 Amines
OCR 6.2.2 Amino acids, Amides and Chirality
OCR 6.2.3 Polyesters and Polyamides
OCR 6.2.4 Carbonācarbon Bond Formation
Organic Synthesis – Organic Synthesis: Aliphatic Compounds (A-Level Chemistry)
Amines – Nitriles (A-Level Chemistry)
Amines – Amine Synthesis (A-Level Chemistry)
Aromatic Chemistry – Friedel-Crafts Acylation and Alkylation (A-Level Chemistry)
Carboxylic Acids and Derivatives – Acyl Groups (A-Level Chemistry)
Carboxylic Acids and Derivatives – Properties and Reactivity of Esters (A-Level Chemistry)
Carboxylic Acids and Derivatives – Properties and Reactivity of Carboxylic Acids (A-Level Chemistry)
Aldehydes and Ketones – Reactions to Increase Carbon Chain Length (A-Level Chemistry)
OCR 6.2.5 Organic synthesis
OCR 6.3.1 Chromatography and Qualitative Analysis
OCR 6.3.2 Spectroscopy
Analytical Techniques – Deuterium use in Ā¹H NMR (A-Level Chemistry)
Analytical Techniques – High Resolution Ā¹H NMR (A-Level Chemistry)
Analytical Techniques – Types of NMR: Hydrogen (A-Level Chemistry)
Analytical Techniques – Types of NMR: Carbon 13 (A-Level Chemistry)
Analytical Techniques – NMR Samples and Standards (A-Level Chemistry)
Analytical Techniques – Nuclear Magnetic Resonance Spectroscopy (A-Level Chemistry)
FAQs
How should I use the OCR A-Level Chemistry revision notes?
There is no right way to revise for your exams. Our notes give you a comprehensive guide to all topics covered in the exams. You can choose to dip into them for a quick recap or use them as a base to write your own notes.
What is covered in the OCR A-Level Chemistry exam?
There are 6 modules that are assessed in the exams: Development of practical skills in chemistry, Foundations in chemistry, Periodic table and energy, Core organic chemistry, Physical chemistry and transition elements, and Organic chemistry and analysis.
How long is the OCR A-Level Chemistry exam?
Students are required to sit three papers. Paper 1: Periodic table, elements and physical chemistry and Paper 2:Synthesis and analytical techniques are both 2 hours and 15 minutes long. They carry a weighting of 37% of your final score. Paper 3: Unified chemistry is 1 hour and 30 minutes long and carries a weighting of 26%. Students are also required to pass a practical endorsement in chemistry but this is done in class and not as an exam.
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