WASSCE syllabus · Main subject in Science
Chemistry
Every topic in the WASSCE Chemistry syllabus, grouped the way you will study it, with lessons written for Sierra Leone students.
- syllabus topics
- 48
- lessons
- 96
- of study
- 12 h 11 min
- practice questions
- 240
The first lesson of every topic is free. No card needed.
Course outline
Chemistry syllabus, section by section
Lessons published for 48 of 48 topics
01Foundations & Atomic Theory6 topics · 12 lessons · 1 h 30 min
- 01Introduction to ChemistryWhat chemistry is, branches of chemistry, physical vs chemical changes, and basic separation techniques.1What chemistry is: branches, importance and careersFree2Scientific method, measurement and laboratory safety8 min 2 lessons 15 min
- 02Particulate Nature of MatterAtoms, molecules, and ions — Dalton's atomic theory and the evidence that matter is made of particles.1Matter: particles, elements, compounds and mixturesFree2Separating mixtures and testing for purity9 min 2 lessons 16 min
- 03Atomic StructureProtons, neutrons, electrons, atomic number, mass number, isotopes, and relative atomic mass.1Inside the atom: particles, atomic number and isotopesFree2Relative atomic mass and radioactivity9 min 2 lessons 17 min
- 04Electronic ConfigurationEnergy levels, sub-shells, and how to write the electron arrangement of any element up to atomic number 20.1Shells, sub-shells and orbitalsFree2Writing electron configurations: Aufbau, Pauli and Hund6 min 2 lessons 13 min
- 05The Periodic Table and PeriodicityGroups, periods, and trends in atomic radius, ionisation energy, electronegativity, and metallic character.1The periodic table: development, groups, periods and blocksFree2Periodic trends: size, ionisation energy and electronegativity7 min 2 lessons 14 min
- 06Chemical BondingIonic, covalent, and metallic bonding, plus dative bonds and intermolecular forces like hydrogen bonding.1Ionic, covalent and dative bondingFree2Metallic bonding, intermolecular forces and shapes of molecules8 min 2 lessons 15 min
02States of Matter & Gas Laws2 topics · 4 lessons · 31 min
- 01States of MatterSolid, liquid, and gas — kinetic theory, changes of state, and how particles behave in each state.1The kinetic theory and the three states of matterFree2Changes of state, heating curves and diffusion8 min 2 lessons 15 min
- 02Gas LawsBoyle's law, Charles' law, Avogadro's law, and the general gas equation.1Boyle's law, Charles' law and the general gas equationFree2Gases in reactions: Gay-Lussac, Avogadro, Graham and Dalton8 min 2 lessons 16 min
03Chemical Calculations3 topics · 6 lessons · 45 min
- 01The Mole ConceptAvogadro's number, molar mass, molar volume of gases, and converting between moles, mass, and number of particles.1The mole, molar mass and the Avogadro constantFree2Molar volume of gases and concentration of solutions8 min 2 lessons 15 min
- 02Chemical Equations and StoichiometryBalancing equations and calculating amounts of reactants and products from balanced equations.1Chemical equations and the laws of chemical combinationFree2Reacting masses, gas volumes and percentage yield8 min 2 lessons 16 min
- 03Empirical and Molecular FormulasFinding empirical and molecular formulas from percentage composition and molar mass.1Empirical formulas from experimental dataFree2Molecular formulas, percentage composition and water of crystallisation7 min 2 lessons 14 min
04Acids, Bases, Salts & Solutions5 topics · 10 lessons · 1 h 18 min
- 01Acids, Bases, and pHDefinitions of acids and bases, the pH scale, strong vs weak acids and bases, and indicators.1Acids and bases: definitions, properties and strengthFree2pH, indicators and neutralisation7 min 2 lessons 16 min
- 02Salts and Their PreparationTypes of salts, methods of preparation, solubility rules, and properties of common salts.1Salts: types, solubility and usesFree2Preparing salts and the hydrolysis of salts8 min 2 lessons 15 min
- 03Acid-Base TitrationVolumetric analysis, choosing indicators, calculating concentration, and titration calculations WAEC tests.1Titration: apparatus, procedure and indicatorsFree2Titration calculations8 min 2 lessons 16 min
- 04Water and Its PropertiesWater as a solvent, hard and soft water, water of crystallisation, and water purification.1Water: composition, properties and hardnessFree2Water treatment and water pollution7 min 2 lessons 15 min
- 05Solutions and SolubilitySolute, solvent, concentration units (molarity, molality), solubility curves, and saturated solutions.1Solutions, suspensions and colloidsFree2Solubility, solubility curves and crystallisation8 min 2 lessons 16 min
05Chemical Reactions & Energy6 topics · 12 lessons · 1 h 31 min
- 01Oxidation and Reduction ReactionsOxidation numbers, redox reactions, oxidising and reducing agents, and balancing redox equations.1Oxidation and reduction: four ways to see themFree2Oxidation numbers, redox equations and IUPAC names7 min 2 lessons 14 min
- 02ElectrolysisElectrolytes, electrolytic cells, electrode reactions, and Faraday's laws of electrolysis.1Electrolysis: electrolytes, electrodes and productsFree2Faraday's laws and uses of electrolysis8 min 2 lessons 15 min
- 03Electrochemical CellsGalvanic cells, standard electrode potentials, and the electrochemical series.1Electrochemical cells and the electrochemical seriesFree2Electrode potentials, batteries and corrosion8 min 2 lessons 16 min
- 04Energy Changes in ReactionsExothermic and endothermic reactions, enthalpy changes, and energy profile diagrams.1Exothermic and endothermic reactionsFree2Hess's law, bond energies and spontaneity8 min 2 lessons 16 min
- 05Rate of ReactionFactors affecting reaction rate, collision theory, and catalysts.1Measuring reaction rates and collision theoryFree2Factors that change the rate of a reaction8 min 2 lessons 15 min
- 06Chemical EquilibriumReversible reactions, dynamic equilibrium, Le Chatelier's principle, and the equilibrium constant.1Reversible reactions and dynamic equilibriumFree2Le Chatelier's principle and the equilibrium constant8 min 2 lessons 15 min
06Inorganic Chemistry — Non-Metals & Metals12 topics · 24 lessons · 3 h 6 min
- 01HydrogenPreparation, properties, uses, and reactions of hydrogen, including position in the periodic table.1Hydrogen: preparation, properties and usesFree2Hydrogen in industry and its compounds7 min 2 lessons 15 min
- 02Oxygen and AirComposition of air, preparation and properties of oxygen, oxides, and atmospheric chemistry.1Oxygen: preparation, properties and oxidesFree2Air: composition, combustion, rusting and pollution8 min 2 lessons 15 min
- 03The HalogensChlorine, bromine, and iodine — properties, preparation, reactions, and uses of halogens.1Chlorine: preparation, properties and usesFree2The halogens as a group: trends and halides7 min 2 lessons 15 min
- 04Nitrogen and Its CompoundsNitrogen, ammonia, nitric acid, the Haber process, and the nitrogen cycle.1Nitrogen and ammoniaFree2Nitric acid, nitrates and the nitrogen cycle8 min 2 lessons 17 min
- 05Sulphur and Its CompoundsSulphur, hydrogen sulphide, sulphur dioxide, sulphuric acid, and the Contact process.1Sulphur: allotropes, properties and oxidesFree2Sulphuric acid, sulphates and hydrogen sulphide8 min 2 lessons 16 min
- 06Carbon and Its Inorganic CompoundsAllotropes of carbon, carbon monoxide, carbon dioxide, carbonates, and the carbon cycle.1Carbon: allotropes and oxidesFree2Carbonates, hydrogencarbonates and the carbon cycle7 min 2 lessons 17 min
- 07Reactivity Series and Extraction of MetalsThe activity series of metals, methods of extraction, and how reactivity determines the method used.1The reactivity series and properties of metalsFree2Extraction of metals and alloys7 min 2 lessons 15 min
- 08Alkali MetalsGroup 1 metals — sodium, potassium — their properties, reactions, and compounds.1The alkali metals: sodium and its groupFree2Sodium compounds and their uses8 min 2 lessons 15 min
- 09Alkaline Earth MetalsGroup 2 metals — calcium, magnesium — their properties, reactions, and compounds.1The alkaline earth metals: magnesium and calciumFree2Calcium compounds: limestone, lime and cement8 min 2 lessons 15 min
- 10Aluminium and Group III MetalsAluminium — extraction, properties, reactions, and important compounds.1Aluminium: extraction from bauxiteFree2Aluminium: properties, compounds and uses8 min 2 lessons 15 min
- 11Iron and Other Transition MetalsIron, copper, and zinc — properties, extraction, compounds, and the chemistry of rust.1Transition metals: general propertiesFree2Iron, steel, copper and zinc8 min 2 lessons 15 min
- 12Industrial Chemical ProcessesBlast furnace, electrolytic refining, fractional distillation of crude oil, and other key industrial chemistry.1The chemical industry: siting, raw materials and safetyFree2Local chemical industries: soap, cement, brewing and salt8 min 2 lessons 16 min
07Organic Chemistry & Applied14 topics · 28 lessons · 3 h 30 min
- 01Introduction to Organic ChemistryWhy carbon is special, homologous series, functional groups, IUPAC naming, and isomerism.1Organic chemistry: homologous series and functional groupsFree2Naming organic compounds, isomerism and purification7 min 2 lessons 13 min
- 02AlkanesSaturated hydrocarbons — properties, reactions (substitution), and uses including fuels.1Alkanes: structure, naming and physical propertiesFree2Reactions of alkanes: combustion and substitution7 min 2 lessons 14 min
- 03AlkenesUnsaturated hydrocarbons with one double bond — preparation, addition reactions, and polymerisation.1Alkenes: structure, preparation and propertiesFree2Addition reactions and tests for unsaturation7 min 2 lessons 14 min
- 04AlkynesUnsaturated hydrocarbons with a triple bond — ethyne, properties, and reactions.1Alkynes: ethyne, its preparation and propertiesFree2Reactions of ethyne; comparing alkanes, alkenes and alkynes7 min 2 lessons 14 min
- 05Petroleum and PetrochemicalsFractional distillation of crude oil, fractions and their uses, and petrochemical products.1Petroleum: origin and fractional distillationFree2Cracking, octane rating and petrochemicals8 min 2 lessons 16 min
- 06AlkanolsAlcohols — ethanol especially — preparation, properties, reactions, and uses.1Alkanols: classes, naming and making ethanolFree2Reactions of alkanols and uses of ethanol7 min 2 lessons 15 min
- 07Alkanoic AcidsCarboxylic acids — ethanoic acid, properties, reactions with metals, bases, and alcohols.1Alkanoic acids: structure, naming and ethanoic acidFree2Reactions of alkanoic acids7 min 2 lessons 14 min
- 08Alkanoates and EstersEsters from acids and alcohols, esterification, hydrolysis, and the smells of common esters.1Esters: esterification and namingFree2Hydrolysis of esters; fats and oils as esters8 min 2 lessons 16 min
- 09Soaps, Detergents, and OilsFats and oils as natural esters, saponification, and how soaps and detergents clean.1Fats, oils and saponificationFree2Soaps and detergents: how they clean8 min 2 lessons 15 min
- 10CarbohydratesMonosaccharides, disaccharides, and polysaccharides — tests for sugars and starch.1Carbohydrates: sugars, starch and celluloseFree2Tests for carbohydrates, hydrolysis and fermentation8 min 2 lessons 15 min
- 11Proteins and Amino AcidsAmino acids, peptide bonds, structure of proteins, and biuret and Millon's tests.1Amino acids and the peptide bondFree2Proteins: structure, tests and denaturation7 min 2 lessons 14 min
- 12Polymers and PlasticsAddition and condensation polymerisation, common polymers, and the plastics problem.1Polymers: addition and condensation polymerisationFree2Plastics, rubber and fibres: uses and disposal7 min 2 lessons 14 min
- 13Chemistry and the EnvironmentAir and water pollution, acid rain, ozone depletion, the greenhouse effect, and climate change.1Air pollution, the greenhouse effect and acid rainFree2Water and land pollution and waste management8 min 2 lessons 17 min
- 14Practical Chemistry SkillsQualitative analysis, volumetric analysis, recording observations, and common WAEC practical experiments.1Tests for gases and ions (qualitative analysis)Free2Volumetric analysis and good practical technique10 min 2 lessons 19 min
240 Chemistry practice questions, marked instantly
4 sets of original WASSCE-style questions, each with the full working. They are not WAEC past papers.
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