Chemistry IGCSE Cambridge

Define electrolysis of ionic compounds in molten or solution form, and apply cathode reduction and anode oxidation with half-equations using lead bromide and aluminium oxide examples, including cryolite's role.

Explore electrolysis of aqueous solutions, identify ions from water and solute, determine cathode and anode roles, and study dilute sulfuric acid and concentrated sodium chloride, including the core alchemy process.

Practice with electrolysis past paper questions covers aluminum extraction from bauxite using cryolite, sodium aluminate, and filtration, plus main reactions at the cathode and anode.

Explore practical electrolysis concepts in copper and nickel electrolytes, aluminium extraction, and electrode reactions, with ionic equations and reactivity considerations through past paper problems.

Explain mole calculation with hydrated crystals, find molecular mass, calculate moles from mass, determine water content x, and apply mole ratios to identify excess reagents in reactions.

Explore the periodic table's groups and periods, reading valence electrons and shells, and learn metal–nonmetal properties, oxides, neutralization, and dot-and-cross diagram techniques.

Explore halogens in group seven, their diatomic states from fluorine to iodine, color changes, hydrogen halides, displacement reactions, and properties of noble gases and transition elements.

Learn how group numbers determine outer electrons and ion formation. Practice dot-and-cross diagrams for ionic compounds like lithium nitrite and potassium fluoride, and distinguish covalent bonds.

Identify transition elements in the periodic table by properties like high melting point, high density, electrical conductivity, and colored compounds; apply these to position-based predictions.

Explore periodic table concepts through a practical past paper, covering group properties, balancing equations, ionic compounds, lattice theory, transition metals' colored solutions and oxidation states, and electrolysis of zinc sulfate.

Explore how to read the periodic table by proton number and mass number, build dot-and-cross diagrams, and identify alkali metals, transition elements, and other groups.

Examine the properties and reactivity trends of group 1 and group 2 metals, group 7 halogens, noble gases, and transition elements, plus displacement and bonding in the periodic table.

Explore halogens reactivity through displacement reactions and interhalogen compounds, and analyze equilibrium shifts, oxidation states, and periodic trends across period three with practical examples.

Learn how metal reactivity governs extraction: metals above carbon require electrolysis, while those below carbon are extracted by reduction with carbon; explore displacement, decomposition, and thermite reactions.

Explore iron extraction in a blast furnace using hematite, coke, and limestone to produce pig iron and slag, then refine into steel alloys, with zinc and aluminium extraction basics.

Explain iron extraction from hematite in a blast furnace, including redox and acid-base reactions, slag formation, and zinc oxide production from zinc sulfide.

Explore zinc galvanizing and sacrificial protection of steel, zinc extraction and purification, brass alloying, blast furnace chemistry, and rusting experiments with zinc, copper, and iron.

Discover how hematite is reduced in a blast furnace to molten iron, how coke and limestone form slag, and how an oxygen furnace removes carbon and other impurities.

Explore chemical energetics, fossil fuels and fractional distillation of crude oil into useful hydrocarbon fractions, and the basics of exothermic and endothermic reactions with enthalpy and activation energy.

Explore chemical energetics through batteries and cells, contrasting electrolysis with galvanic cells, analyzing zinc–copper reactions, fuel cells, and redox principles, plus exothermic and endothermic energy changes.

Explore energy changes in chemical reactions, fossil fuels, and energy production, including fractional distillation, combustion, exothermic and endothermic processes, and enthalpy change.

Explore the properties of sulfur and master the contact process, converting sulfur to sulfur dioxide and sulfur trioxide, making sulfuric acid via oleum, with vanadium five oxide catalyst at 450°C.

Study sulfur properties and the contact process to produce sulfuric acid: sulfur dioxide to sulfur trioxide with vanadium five oxide at 450°C and 1 atm, then oleum to sulfuric acid.

Examine precipitation and acid–base concepts through hands-on silver nitrate and potassium chromate reactions, charge and mole calculations, and rate comparisons across diverse acids.

Learn how to perform titrations to prepare soluble and insoluble salts, determine endpoint, and obtain dry crystals by saturation, cooling, and careful drying.

Explore the atmosphere, air composition (78% nitrogen, 21% oxygen, 0.9% argon, 0.04% carbon dioxide), and gas separation via liquefaction, distillation, and the Haber process for ammonia.

Explore how carbon monoxide binds to hemoglobin, impairing oxygen transport, and how sulfur dioxide and nitrogen oxides from fossil fuel combustion form acid rain, affecting ecosystems and buildings.

Explore the Haber process for ammonia production, detailing iron catalysts, reaction conditions, equilibrium shifts, and practical considerations for industrial yields.

Explore organic chemistry basics by examining hydrocarbons, including alkanes, alkenes, and alkynes, their formulas, properties, isomerism, and key reactions such as combustion, halogen substitution, cracking, hydrogenation, and hydration.

Learn about alcohols, carboxylic acids, and esters in organic chemistry; study alcohol properties, naming, ethanol production by hydration and fermentation, and oxidation to carboxylic acids.

Master drawing and naming of alcohols, alkenes, and carboxylic acids such as butan-1-ol and but-1-ene. Practice cracking decane, ester formation, and neutralization to form sodium benzoate.

Study carboxylic acids as a homologous series with the carboxyl group, learn naming from methanoic to propanoic acid, and cover reactions with bases, carbonates, and esterification.

Master mole-ratio calculations for alkane combustion, explore alkane substitution and isomerism with chlorobutane, and learn cracking and balancing through practical examples with butane and octane.