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Cambridge IGCSE Chemistry 0620 and 0971, topic by topic
0620 and 0971 are the same Cambridge IGCSE chemistry syllabus: identical content and identical papers, reported on the A*-G scale as 0620 and on the 9-1 scale as 0971. Whichever code is on your timetable, this page is the one you want. It is examined across three tiers of written paper and one practical component. This page maps the whole syllabus onto the experiments that make each part make sense - so a topic that reads as a paragraph in a textbook can be run, broken and re-run until the observation is obvious.
Open the digital labTopic by topic
Start anywhere. Each row is a syllabus area; each link is a simulator that covers it, with the method, the observations and the marks examiners take off written underneath.
The labs in full
24 experiments matter for this syllabus. Each opens on its own page and is free to use.
States of matter
Turn the burner up and watch the particle picture change with it.
Open the lab → IGCSE · Class 9-11Build an atom
Drag protons, neutrons and electrons in and watch the element, mass number and charge follow.
Open the lab → IGCSE · Class 9-12Rutherford gold foil experiment
Fire alpha particles at gold foil in 3D and count the flashes yourself.
Open the lab → IGCSE 0620/0971 · Physics 0625 · CBSECathode ray experiment
Pump the tube down, switch the EHT on, then bend the beam with plates and coils, or spin a paddle wheel with it.
Open the lab → All levels3D molecular lab
Bond angles, hybridisation, VSEPR shape and polarity for any molecule.
Open the lab → IGCSE · IB · CBSEPeriodic table explorer
Group and period trends element by element, plus a trends quiz.
Open the lab → IGCSE · Class 9-11Balancing equations
A live atom tally and a mass balance that tips until both sides match.
Open the lab → CBSE Class 10Electrolysis of water
Guided steps, ions you can watch move, and the 2:1 gas ratio built in front of you.
Open the lab → IGCSE 0620/0971 · CBSEMolten lead bromide
Melt it, switch on, and watch lead form at one electrode and bromine at the other.
Open the lab → Class 10 · JEEChlor-alkali process
Brine electrolysis in a membrane cell, all three products traced.
Open the lab → CBSE Class 10Thermite reaction
Aluminium reduces iron(III) oxide and the temperature runs away past 2000 C.
Open the lab → CBSE Class 10Burning magnesium ribbon
Clean the ribbon, light it, collect the white magnesium oxide ash.
Open the lab → IGCSE · Class 10-12Rate of reaction
Acid and metal at five concentrations, timed, with the gas collected.
Open the lab → Class 10-12Concentration and rate
One variable at a time, and the gradient does the talking.
Open the lab → IGCSE · Class 10Indicators and pH
Five indicators across pH 0 to 14 with their transition ranges.
Open the lab → IGCSE 0620Strong and weak acids
Acid X against acid Y until the difference is obvious.
Open the lab → IGCSE · Class 10Metals with water and steam
Caesium down to calcium in the trough, magnesium to iron on the steam rig.
Open the lab → CBSE Class 10Rusting of iron
Set moisture, oxygen and salt, then run the clock forward.
Open the lab → CBSE Class 10Green patina on copper
Humidity and carbon dioxide against exposure time.
Open the lab → CBSE Class 10Tarnishing of silver
Silver sulfide film growth in nanometres, with real thin-film colours.
Open the lab → CBSE Class 10Double displacement
Two salt solutions, one precipitate, and the spectator ions named.
Open the lab → IGCSE · Class 10Tests for gases
Six gases against every reagent, then Mystery mode for an unknown.
Open the lab → IGCSE · Class 10-12Fractional distillation
A 3D refinery column you can turn, splitting crude oil into its eight fractions.
Open the lab → CBSE XII · IGCSECation and anion tests
Salt analysis at a real reagent shelf, one test at a time.
Open the lab →Common questions
What is IGCSE Chemistry 0620?
Cambridge IGCSE Chemistry, syllabus code 0620, is a two-year international qualification usually taken at the end of Year 11. It is offered at Core tier, graded C to G, and Extended tier, graded A* to E, and the entry decides which papers a candidate sits.
Which papers make up 0620?
Paper 1 or Paper 2 is the multiple-choice paper, Core or Extended. Paper 3 or Paper 4 is the theory paper, Core or Extended. Paper 5 is a timed practical test and Paper 6 is the alternative to practical, a written paper about experiments; a school enters candidates for one or the other.
Do I need a lab to prepare for Paper 5 and Paper 6?
You need bench time to learn apparatus handling, but most marks in both papers are for planning, recording observations, handling data and evaluating a method. Those you can rehearse anywhere, which is what the simulators on this page are for.
What is the difference between Core and Extended?
Extended covers everything in Core plus additional content, and is the only route to grades A* to B. Supplement material - the extra Extended sections - is marked in the syllabus, and the simulators here cover both.
Are the simulators free?
Yes. Every experiment on this site opens in a browser with no account and no install, and keeps working offline once it has loaded. Tuition is separate.
Studying something else?
The same labs, grouped for a different syllabus.