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GCSE Chemistry (Cognito)

By Cognito

Course audio
Course audio: English
Level
Beginner
Length
78 lessons · 6.9 hours

What you'll be able to do

  • Describe atoms, ions and isotopes
  • Balance chemical equations and choose separation techniques
  • Explain water treatment and the Haber process

About this course

Cognito's GCSE (9-1) chemistry course in about 80 short animated videos of roughly five minutes each. It starts with atoms and ions (protons, neutrons, electrons), elements, isotopes and relative atomic mass, compounds and mixtures, balancing equations and separation techniques such as filtration, crystallisation and distillation, then covers bonding, quantitative chemistry, chemical changes, energy changes, rates, organic chemistry, chemical analysis and the atmosphere, ending with potable water, waste water treatment and the Haber process. Clear and compact, it matches O Level and IGCSE chemistry closely and is ideal for quick revision of a topic.

Syllabus

78 lessons · 6:53:53 in total

  1. 1Atoms & Ions | Protons, Neutrons, Electrons (2027/28 Exams)7:49
  2. 2GCSE Chemistry - Elements, Isotopes & Relative Atomic Mass (2027/28 exams)7:23
  3. 3GCSE Chemistry - Compounds, Molecules & Mixtures (2027/28 exams)6:21
  4. 4GCSE Chemistry - Balancing Equations | Writing Word & Symbol Equations (2027/28 exams)6:24
  5. 5GCSE Chemistry - Separation Techniques - Filtration | Evaporation | Crystallisation5:19
  6. 6GCSE Chemistry - Distillation - Simple & Fractional Distillation (2027/28 exams)5:19
  7. 7GCSE Chemistry - The History of the Atom | Models & Theories (2027/28 exams)5:02
  8. 8GCSE Chemistry - Electronic Structure (2027/28 exams)6:51
  9. 9GCSE Chemistry - Development of the Periodic Table (2027/28 exams)6:07
  10. 10GCSE Chemistry - Metals & Non-metals: Electron Arrangement & Properties (2027/28 exams)5:13
  11. 11GCSE Chemistry - Group 1 Elements - Alkali Metals | Properties | Reactivity (2027/28 exams)6:20
  12. 12GCSE Chemistry - Group 7 & Group 0 Elements - Halogens & Noble Gases | Properties | Trends5:19
  13. 13GCSE Chemistry - Formation of Ions - Electrons | Charge | Equations (2027/28 exams)3:56
  14. 14GCSE Chemistry - Ionic Bonding - Formation | Dot and Cross Diagrams (2027/28 exams)4:39
  15. 15GCSE Chemistry - Ionic Compounds - Structure | Properties | Formula (2027/28 exams)6:32
  16. 16GCSE Chemistry - Covalent Bonding - Formation | Drawing Covalent Bonds (2027/28 exams)5:57
  17. 17GCSE Chemistry - Types of Covalent Structures: Simple Molecular & Giant Covalent Structures5:22
  18. 18GCSE Chemistry - Diamond & Graphite - Structure | Properties (2027/28 exams)3:47
  19. 19GCSE Chemistry - Graphene & Fullerenes - Structure | Properties | Uses (2027/28 exams)3:34
  20. 20GCSE Chemistry - Metallic Bonding - Properties of Metals | Alloys & Pure Metals (2027/28 exams)3:59
  21. 21GCSE Chemistry - States of Matter & Changing State4:22
  22. 22GCSE Chemistry - Nanoparticles - Uses | Risks (2027/28 exams)4:26
  23. 23GCSE Chemistry - What is a Polymer? Polymers / Monomers / Their Properties Explained (2026/27 exams)3:33
  24. 24GCSE Chemistry - Relative Formula Mass | Mr & Percentage Mass Calculations (2027/28 exams)4:31
  25. 25GCSE Chemistry - Moles & Mass - Avogadro's Constant | Formula for Moles, Mass & Mr (2027/28 exams)4:53
  26. 26GCSE Chemistry - Conservation of Mass (2027/28 exams)4:33
  27. 27GCSE Chemistry - Limiting Reactants & Balanced Equations (2027/28 exams)4:45
  28. 28GCSE Chemistry - Gas Calculations - Volume & Moles | Mass, Moles & Mr (2027/28 exams)6:58
  29. 29GCSE Chemistry - Moles, Concentration & Volume Calculations6:04
  30. 30GCSE Chemistry - Concentration Calculations (grams per dm³) (2027/28 exams)3:53
Show all 78 lessons
  1. 31GCSE Chemistry - Atom Economy - Calculations | Why it's Important (2027/28 exams)5:21
  2. 32GCSE Chemistry - State Symbols & Predicting States of Matter2:59
  3. 33GCSE Chemistry - Percentage Yield - Theoretical & Actual Yield | Calculations (2027/28 exams)5:10
  4. 34GCSE Chemistry - Acids & Bases - pH | Features | Neutralisation Reactions (2027/28 exams)5:32
  5. 35GCSE Chemistry - Strong Acids & Weak Acids | pH & Concentration of Hydrogen Ions (2027/28 exams)5:40
  6. 36GCSE Chemistry - Neutralisation Reactions | Reactions of Acids (2027/28 exams)5:05
  7. 37GCSE Chemistry - The Reactivity Series - Metal Reactions | Displacement Reactions (2027/28 exams)4:28
  8. 38GCSE Chemistry - Separating Metals from Metal Oxides | Extraction of Metals & Reduction4:40
  9. 39GCSE Chemistry - Redox Reactions - Displacement Reactions | Ionic Equations | Half Equations5:19
  10. 40Electrolysis Part 1/3 - Basics and Molten Compounds (2027/28 Exams)4:20
  11. 41Electrolysis Part 2/3 - Electrolysis to Extract Metals From Oxides (2027/28 Exams)6:25
  12. 42Electrolysis Part 3/3 - Aqueous Solutions (2027/28 Exams)6:03
  13. 43GCSE Chemistry - Exothermic & Endothermic Reactions - Reaction Profiles | Activation Energy5:48
  14. 44GCSE Chemistry - Bond Energies - Determining if Reactions are Exothermic or Endothermic4:54
  15. 45GCSE Chemistry - Fuel Cells - Structure | How they Work | Half Equations | Pros & Cons7:44
  16. 46GCSE Chemistry - Rates of Reaction - How to Measure it | How to Show it on Graphs (2027/28 exams)5:02
  17. 47GCSE Chemistry - Factors Affecting Rate of Reaction & Collision Theory (2027/28 exams)5:38
  18. 48GCSE Chemistry - Measuring Rates of Reaction from Graphs - Mean Rate & Rate at a Specific Time6:35
  19. 49GCSE Chemistry - Reversible Reactions & Dynamic Equilibrium (2027/28 exams)6:28
  20. 50GCSE Chemistry - Le Chatelier's Principle - Position of Equilibrium in Reversible Reactions4:13
  21. 51GCSE Chemistry - Hydrocarbons - Alkanes & Homologous Series (2027/28 exams)5:05
  22. 52GCSE Chemistry - Alkanes - Properties & Combustion (2027/28 exams)5:56
  23. 53GCSE Chemistry - Fractional Distillation - Crude Oil | Hydrocarbons (2027/28 exams)5:35
  24. 54GCSE Chemistry - Crude Oil and Fractional Distillation5:30
  25. 55GCSE Chemistry - Cracking & Alkenes - Catalytic & Steam Cracking | Equations (2027/28 exams)6:41
  26. 56GCSE Chemistry - Cracking Crude Oil & Alkenes6:30
  27. 57GCSE Chemistry - Addition Reactions of Alkenes5:45
  28. 58GCSE Chemistry - Addition Polymers & Polymerisation (2026/27 exams)7:11
  29. 59GCSE Chemistry - Alcohols4:08
  30. 60GCSE Chemistry - Carboxylic Acids (2026/27 exams)3:05
  31. 61GCSE Chemistry - Esters (2026/27 exams)2:02
  32. 62GCSE Chemistry - Condensation Polymers (Polyesters) (2026/27 exams)5:19
  33. 63GCSE Chemistry - Naturally Occurring Polymers - Polypeptides, DNA, and Carbohydrates (2026/27 exams)5:52
  34. 64GCSE Chemistry - Purity & Formulations (2027/28 exams)5:19
  35. 65GCSE Chemistry - Paper Chromatography6:33
  36. 66GCSE Chemistry - Testing for Gases - Hydrogen/Chlorine/Oxygen/CO2 (2027/28 exams)4:01
  37. 67GCSE Chemistry - Tests for Anions - Carbonate, Sulfate and Halide Ions (2026/27 exams)4:50
  38. 68GCSE Chemistry - Flame Emission Spectroscopy (Flame Photometry) (2026/27 exams)4:11
  39. 69GCSE Chemistry - Evolution of the Atmosphere | How the Atmosphere Changed Over Time (2027/28 exams)5:12
  40. 70GCSE Chemistry - Greenhouse Gases & Climate Change (2027/28 exams)6:29
  41. 71GCSE Chemistry - Carbon Footprints - Measuring Footprints | Reducing Emissions (2027/28 exams)4:34
  42. 72GCSE Chemistry - Air Pollution - How Pollutants are Made | Why They're Harmful (2027/28 exams)4:36
  43. 73GCSE Chemistry - What is Corrosion and How to Stop it (2026/27 exams)6:19
  44. 74GCSE Chemistry - Sustainable Development - Reuse & Recycling (2027/28 exams)4:21
  45. 75GCSE Chemistry - Lifecycle Assessments (LCAs) - Stages | Examples | Limitations (2027/28 exams)6:10
  46. 76GCSE Chemistry - Potable Water - Treating Freshwater | Desalinating Seawater (2027/28 exams)5:15
  47. 77GCSE Chemistry - Waste Water Treatment - Sources of Waste Water | How to Treat it (2027/28 exams)5:12
  48. 78GCSE Chemistry - The Haber Process Explained (2026/27 exams)5:37

What to take next

Videos by Cognito, played from their official YouTube channel. Subscribe on YouTube

Official upload by the teacher or institution on their own channel, shown with YouTube's embedded player.

Lessons listed from the official YouTube playlist. Full playlist on YouTube

Lessons last checked Oct 2026. Course summary and lesson structure by Sabaq.

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