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Play with Chemistry

See it. Move the atoms. Read the equation.

Every experiment on three levels at once — what you see, what the particles do, and the chemist's shorthand. Classes 6–10 — live now with your EasyICSE.com subscription.

All 321 Play With Chemistry lessons

Every lesson in the series, by class. Lessons marked with a link are free to play without an account.

Class 6

  • Welcome to Chemistry World — Explore how chemistry shapes your daily life. · Introduction to Chemistry
  • From Magic to Science — Trace the history from Alchemy to Modern Chemistry. · Introduction to Chemistry
  • Meet the Great Chemists — Learn about Boyle, Lavoisier, Dalton, and Curie. · Introduction to Chemistry
  • Chemistry in Food & Farm — Discover fertilizers, pesticides, and food preservatives. · Introduction to Chemistry
  • Chemistry in Clothes & Meds — See how chemistry makes medicines and synthetic fabrics. · Introduction to Chemistry
  • Chemistry in Industry — Explore metals, plastics, and building materials. · Introduction to Chemistry
  • Chemistry: Gift or Danger? — Sort chemistry's gifts from its dangers. · Introduction to Chemistry
  • The Lab Toolkit — What each piece of apparatus is for. · Common Laboratory Apparatus and Equipments
  • Safety First — Tell safe lab habits from dangerous ones. · Common Laboratory Apparatus and Equipments
  • Measuring Up — Match each instrument to what it measures. · Common Laboratory Apparatus and Equipments
  • Heating Tools — The right gear for heating safely. · Common Laboratory Apparatus and Equipments
  • Heat It Safely — Set up lab glassware the right way to heat a liquid. · Common Laboratory Apparatus and Equipments
  • Light the Bunsen Burner — The safe steps to a clean blue flame. · Common Laboratory Apparatus and Equipments
  • Observe Like a Scientist — Tell what you SEE from what you GUESS. · Common Laboratory Apparatus and Equipments
  • Matter Everywhere — What counts as matter — and what doesn't. · Matter
  • The Particle Puzzle — Just how tiny are atoms and molecules? · Matter
  • Solid Stronghold — How tightly particles are packed in each state. · Matter
  • Solid, Liquid, or Gas? — Sort everyday things by their state of matter. · Matter
  • Gas Expansion — How gases spread to fill all the space they're given. · Matter
  • State Shifter — Convert states using heat and kinetic energy · Matter
  • Smells on the Move — Why a smell spreads across a room. · Matter
  • Skipping the Liquid — Solids that turn straight into vapour. · Matter
  • Heat Makes Things Grow — Which state expands most when heated. · Matter
  • The Restless Dance — Why tiny specks never sit still. · Matter
  • Pure or Impure? — Sort matter into pure substances and mixtures. · Elements, Compounds, Symbols and Formulae
  • Element Detective — Classify elements as metals, non-metals, or noble gases. · Elements, Compounds, Symbols and Formulae
  • Symbol Match-Up — Match element names to their chemical symbols. · Elements, Compounds, Symbols and Formulae
  • Build a Compound — Combine elements to form simple compounds like water. · Elements, Compounds, Symbols and Formulae
  • Formula Factory — Use valencies to write correct chemical formulae. · Elements, Compounds, Symbols and Formulae
  • How Many Atoms? — Group molecules by how many atoms they hold. · Elements, Compounds, Symbols and Formulae
  • Four Families of Elements — Sort elements into metals, non-metals, metalloids and noble gases. · Elements, Compounds, Symbols and Formulae
  • The Many Faces of Carbon — From soft pencil lead to the hardest diamond. · Elements, Compounds, Symbols and Formulae
  • Pure Gold or Mixed Salad? — Spot the difference between pure substances and mixtures. · Pure Substances and Mixtures; Separation of Mixtures
  • Spot the Invisible Mix — Classify mixtures as homogeneous or heterogeneous. · Pure Substances and Mixtures; Separation of Mixtures
  • Chemical Bond or Just Friends? — Compare compounds and mixtures using iron and sulfur. · Pure Substances and Mixtures; Separation of Mixtures
  • Separation Station — Pull a mixture back into its parts. · Pure Substances and Mixtures; Separation of Mixtures
  • Pick the Right Separation — Match each mixture to the best technique. · Pure Substances and Mixtures; Separation of Mixtures
  • Solute Meets Solvent — Build a solution and name its parts. · Pure Substances and Mixtures; Separation of Mixtures
  • The Invisible Blanket — Prove that air really takes up space. · Air and Atmosphere
  • Mixing the Atmosphere — Explore why air is a mixture, not a compound. · Air and Atmosphere
  • Detecting Carbon Dioxide — Turn lime water milky to prove CO2 is in air. · Air and Atmosphere
  • Fueling Life — See how respiration releases energy from food and oxygen. · Air and Atmosphere
  • Oxygen Feeds the Flame — Things burn brightly in oxygen. · Air and Atmosphere
  • Why Iron Rusts — Iron needs BOTH air and water to rust. · Air and Atmosphere
  • Nature's Air Factory — Green leaves turn CO₂ and water into food and oxygen. · Air and Atmosphere
  • When Air Turns Bad — Sort what pollutes the air from what protects it. · Air and Atmosphere
  • Fuels & Fire — Tell a fuel from a non-fuel — and what burning needs. · Air and Atmosphere
  • Nitrogen: The Quiet Giant — The gas that fills most of the air. · Air and Atmosphere
  • Gases at Work — Match each gas to its everyday job. · Air and Atmosphere
  • Build the Water Molecule — Combine hydrogen and oxygen atoms to form H2O · Water
  • Ice, Water, and Steam — Follow water as heat turns it from solid to gas. · Water
  • The Great Water Cycle — Trace water from the sea to the clouds and back. · Water
  • Water in Living Things — Discover how much water is in your body and food · Water
  • The Universal Solvent — Sort what dissolves in water from what won't. · Water
  • Full Up! Saturation — How to dissolve the most sugar in water. · Water
  • Making Water Safe — Turn muddy river water into safe tap water. · Water
  • Why Ice Floats — Water's strange trick near freezing. · Water
  • Where Water Comes From — Fresh or salty? Sort the sources. · Water
  • Keep Water Clean — Sort what pollutes water from what protects it. · Water
  • Sick from Dirty Water — Why clean water keeps you healthy. · Water
  • Fog, Dew & Frost — Water's many faces in the sky. · Water

Class 7

  • Mass, Space, and You — Prove matter has mass and occupies space · Matter and Its Composition
  • Tiny Building Blocks — Discover atoms and molecules inside matter · Matter and Its Composition
  • Space, Force, and Motion — Explore gaps, attraction, and movement · Matter and Its Composition
  • Solid, Liquid, Gas — See how particles arrange in different states · Matter and Its Composition
  • Particles on the Move — Why a smell drifts across the whole room. · Matter and Its Composition
  • Straight to Vapour — Solids that skip the liquid state. · Matter and Its Composition
  • Change Detective: Sort the Chaos — Classify changes as physical or chemical. · Physical and Chemical Changes
  • Undo Button: Reversible or Not? — Determine if a change can be reversed. · Physical and Chemical Changes
  • Spot the New Substance — Tell a chemical change from a physical one by its signs. · Physical and Chemical Changes
  • New Stuff: Chemical Changes — Identify signs of new substance formation. · Physical and Chemical Changes
  • Fire Starter: Burning Reactions — Observe combustion as a chemical change. · Physical and Chemical Changes
  • Break It Down: Decomposition — Watch compounds break into simpler substances. · Physical and Chemical Changes
  • Team Up: Combination Reactions — See elements combine to form compounds. · Physical and Chemical Changes
  • Desirable or Not? — Some changes help us; some we try to stop. · Physical and Chemical Changes
  • The Candle''s Secret — A burning candle shows both kinds of change at once. · Physical and Chemical Changes
  • Pure or Impure? Sort It! — Sort substances into pure substances and mixtures. · Elements, Compounds and Mixtures
  • Element Detective: Symbols & Names — Match element names to their unique chemical symbols. · Elements, Compounds and Mixtures
  • Build Compounds: Fixed Ratios — Combine elements in fixed ratios to form compounds. · Elements, Compounds and Mixtures
  • Mixture Mystery: Properties Retained — Observe how components in mixtures keep their own properties. · Elements, Compounds and Mixtures
  • Split the Mixture — Match each mixture to the best separation method. · Elements, Compounds and Mixtures
  • The Colour Splitter — Split a dye into its hidden colours. · Elements, Compounds and Mixtures
  • Separating Liquids — Funnel or flask? Pick the right tool. · Elements, Compounds and Mixtures
  • Even or Uneven Mix? — Sort mixtures by how uniform they look. · Elements, Compounds and Mixtures
  • What Is an Atom? — The smallest particle of an element. · Atomic Structure
  • Inside the Atom — Meet protons, neutrons, and electrons · Atomic Structure
  • Atoms Join Up — How atoms combine to form molecules · Atomic Structure
  • Counting Atoms — Monatomic, diatomic, and polyatomic molecules · Atomic Structure
  • Charged Groups — Understanding radicals and ions · Atomic Structure
  • Combining Power — What is valency and why it matters · Atomic Structure
  • Formula Builder — Use criss-cross method to write formulas · Atomic Structure
  • Metals with Two Valencies — Some metals combine in more than one way. · Atomic Structure
  • Reactants vs Products — Identify what changes and what forms · Language of Chemistry
  • Spot the Reaction — Detect color, gas, precipitate, or energy changes · Language of Chemistry
  • Write Word Equations — Translate chemical changes into simple words · Language of Chemistry
  • Heat Up or Cool Down? — Classify exothermic and endothermic reactions · Language of Chemistry
  • Make It React — Apply heat, light, or solution to start reactions · Language of Chemistry
  • Balance It! — Make the atoms equal on both sides of the arrow. · Language of Chemistry
  • Shiny Metals vs Dull Non-metals — Compare lustre, hardness, and sonority of elements. · Metals and Non-metals
  • Heat and Electricity Race — Test which materials conduct heat and electricity. · Metals and Non-metals
  • Hammer Time: Malleable or Brittle? — See if you can beat them into sheets. · Metals and Non-metals
  • The Rusty Nail Experiment — Observe iron reacting with oxygen and water. · Metals and Non-metals
  • Mission: Stop the Rust — Apply paint, oil, or galvanization to protect metal. · Metals and Non-metals
  • The Metalloid Mystery — Identify elements that are neither metal nor non-metal. · Metals and Non-metals
  • Everyday Elements Hunt — Match metals and non-metals to their common uses. · Metals and Non-metals
  • Metals Meet Acid — Watch a metal fizz in acid and give off hydrogen. · Metals and Non-metals
  • Metals Burn to Oxides — Metals join with oxygen to make basic oxides. · Metals and Non-metals
  • Who Reacts Hardest? — Rank metals by how vigorously they react. · Metals and Non-metals
  • Mixing Metals: Alloys — Match each alloy to what is inside it. · Metals and Non-metals
  • The Invisible Soup — Explore why air is a mixture, not a compound. · Air and Atmosphere
  • Lavoisier's Mercury Trap — Discover oxygen and nitrogen through Lavoisier's classic experiment. · Air and Atmosphere
  • Fire and Life — See how oxygen fuels burning and respiration. · Air and Atmosphere
  • Nitrogen's Big Journey — Trace nitrogen from air to soil to plants. · Air and Atmosphere
  • Stormy Reactions — Balance the equations for lightning-induced nitrogen fixation. · Air and Atmosphere
  • Oxygen Factory — Prepare oxygen in the lab using decomposition. · Air and Atmosphere
  • Meet Carbon Dioxide — The gas that puts out fires and fizzes your drinks. · Air and Atmosphere
  • Fast Fire, Slow Rust — Two speeds of joining with oxygen. · Air and Atmosphere
  • Acid or Base Oxide? — Metal oxides and non-metal oxides behave oppositely. · Air and Atmosphere
  • What Fire Needs — Remove one side and the fire goes out. · Air and Atmosphere
  • Dirty Air — Sort what pollutes the air from what protects it. · Air and Atmosphere
  • Plants Refill the Air — How oxygen and carbon dioxide stay in balance. · Air and Atmosphere

Class 8

  • The Dance of Particles — One slider, three states of matter · Matter
  • The Mystery of Matter — Discover the two tests of matter: mass and space · Matter
  • Atoms and Molecules — Snap two atoms together to build a molecule · Matter
  • Melting, Boiling, Freezing — Heat and cool to change states · Matter
  • Dancing Particles — Spot the evidence that particles never stop moving · Matter
  • Mass Never Disappears — Balance the scale of reactions · Matter
  • Ice, Water, Steam: The Shape Shifters — Explore reversible physical changes in states of matter · Physical and Chemical Changes
  • Sort It: Physical or Chemical? — Classify everyday changes based on reversibility and new substances · Physical and Chemical Changes
  • The Heavy Ash: Burning Magnesium — Observe mass gain and new substance formation in combustion · Physical and Chemical Changes
  • Rusty Iron: A Slow Change — Witness the slow, irreversible chemical change of rusting · Physical and Chemical Changes
  • Candle Magic: Two Changes at Once — Identify simultaneous physical melting and chemical burning · Physical and Chemical Changes
  • Heat Up or Cool Down? — Detect energy release in exothermic chemical reactions · Physical and Chemical Changes
  • Pure Gold or Dirty Mud? — Sort substances into elements, compounds, and mixtures. · Elements, Compounds and Mixtures
  • The Element Identity Card — Classify elements into metals, non-metals, and noble gases. · Elements, Compounds and Mixtures
  • Recipe for a Compound — Combine elements in fixed ratios to create new substances. · Elements, Compounds and Mixtures
  • Breaking Bonds: Decomposition — Use heat or electricity to split compounds back into elements. · Elements, Compounds and Mixtures
  • Element or Compound? — Compare properties to distinguish between elements and compounds. · Elements, Compounds and Mixtures
  • The Invisible Building Blocks — Zoom from a charcoal lump down to a single, indivisible atom. · Atomic Structure
  • Chasing the Negative Ray — Discover electrons using J.J. Thomson's cathode ray experiment. · Atomic Structure
  • The Positive Core Discovery — Find protons and the dense nucleus using alpha particle scattering. · Atomic Structure
  • The Ghost Particle Found — Complete the atom by adding neutral neutrons to the nucleus. · Atomic Structure
  • ID Card of an Atom — Calculate atomic number and mass number from particle counts. · Atomic Structure
  • The Atom Factory — Build sodium one particle at a time · Atomic Structure
  • The Combining Power — Why MgCl₂ and never MgCl · Language of Chemistry
  • The Criss-Cross Trick, Level 2 — Radicals travel as a team — in brackets · Language of Chemistry
  • The Atom Accountant — Your first balanced equation · Language of Chemistry
  • Balancing the Fire — Methane, the kitchen flame · Language of Chemistry
  • The Pop Test — Zinc meets dilute acid — and a gas is born · Chemical Reactions
  • The Dazzling White Light — Combination: two become one · Chemical Reactions
  • Limestone's Secret — Decomposition: one becomes two · Chemical Reactions
  • The Blue That Fades — Displacement: the stronger metal wins · Chemical Reactions
  • Snow in a Test Tube — Double displacement: partners swap · Chemical Reactions
  • The Acid Tamer — Neutralisation: acid + base → salt + water · Chemical Reactions
  • Splitting Water with Electricity — When heat isn't enough · Chemical Reactions
  • Build the Lightest Molecule — Pair two hydrogen atoms and share electrons to make H₂. · Hydrogen
  • Split Water with Electricity — Observe hydrogen and oxygen production via electrolysis. · Hydrogen
  • Zinc and Acid Reaction — Prepare hydrogen gas using zinc and dilute acids. · Hydrogen
  • Metal Reactivity Challenge — Rank the metals from most reactive to least. · Hydrogen
  • Steam and Hot Metals — See how steam reacts with heated metals like iron and zinc. · Hydrogen
  • Properties of Hydrogen Gas — Explore physical properties and combustion of hydrogen. · Hydrogen
  • The Great Water Cycle — Put the stages of the water cycle in order. · Water
  • Build a Water Molecule — Watch oxygen and hydrogen share electrons to make H₂O. · Water
  • Why Ice Floats? — Discover the anomalous expansion of water. · Water
  • Metals vs Water — Watch sodium and zinc react with water. · Water
  • Hard Water Trouble — Build the salts that make water hard. · Water
  • Softening the Water — Precipitate calcium ions to soften water. · Water
  • Build the Carbon Atom — Explore protons, neutrons, and electrons in Carbon-12 · Carbon and Its Compounds
  • Diamond vs Graphite Battle — Compare structures, hardness, and conductivity of carbon forms · Carbon and Its Compounds
  • Burn Carbon to CO2 — Observe complete combustion of carbon in oxygen · Carbon and Its Compounds
  • Cloudy Lime Water Test — React CO2 with calcium hydroxide to form precipitate · Carbon and Its Compounds
  • CO2 Makes Acid — Dissolve carbon dioxide in water to form carbonic acid · Carbon and Its Compounds
  • Char Sugar for Carbon — Heat sugar to reveal black carbon residue · Carbon and Its Compounds

Class 9

  • Crack the Chemical Code — Learn symbols from English and Latin names · The Language of Chemistry
  • The Combining Power — Understand valency through hydrogen and oxygen · The Language of Chemistry
  • Radicals: Atoms That Travel in Gangs — Criss-cross with polyatomic ions · The Language of Chemistry
  • Formula Jigsaw Puzzle — Use criss-cross method to write compound formulas · The Language of Chemistry
  • Equation Balancing Act — Balance simple chemical equations using hit-and-trial · The Language of Chemistry
  • Weighing Atoms — Calculate relative atomic and molecular masses · The Language of Chemistry
  • Recipe Ratios — Find percentage composition of elements in compounds · The Language of Chemistry
  • Mix, Heat, Spark: Reaction Triggers — Explore conditions needed for chemical changes. · Chemical Changes and Reactions
  • Spot the Change: Gas, Color, Ppt — Identify observable evidence of chemical reactions. · Chemical Changes and Reactions
  • Build It Up: Combination Reactions — Combine elements and compounds into new substances. · Chemical Changes and Reactions
  • Break It Down: Decomposition — Split compounds using heat, light, or electricity. · Chemical Changes and Reactions
  • Swap Partners: Displacement Reactions — Watch more reactive elements kick out others. · Chemical Changes and Reactions
  • Double Trouble: Double Decomposition — Exchange ions to form precipitates or water. · Chemical Changes and Reactions
  • Energy Flow: Exo vs Endo — Track heat absorption and release in reactions. · Chemical Changes and Reactions
  • Ice Floats: The Anomaly — Explore density and anomalous expansion of water · Water
  • Universal Solvent Secrets — Why water dissolves salts and gases · Water
  • The Sugar That Refuses — Saturated solutions and cooling crystals · Water
  • Crystal Water Hunt — Identify water of crystallisation in salts · Water
  • Moisture Masters — Distinguish efflorescence, deliquescence, and hygroscopy · Water
  • Hard Water Mystery — Identify ions causing temporary and permanent hardness · Water
  • Boil Away Hardness — Remove temporary hardness by boiling · Water
  • Washing Soda Rescue — Remove permanent hardness using sodium carbonate · Water
  • Dry Lab Challenge — Select correct drying agents for gases · Water
  • The Air Hiding in Water — Dissolved gases keep ponds alive · Water
  • Cracking the Uncuttable Atom — From Dalton's postulates to Thomson's plum pudding · Atomic Structure and Chemical Bonding
  • The Gold-Foil Ambush — One bounce in ten thousand revealed the nucleus · Atomic Structure and Chemical Bonding
  • Build Your First Atom — Discover protons, neutrons, and electrons · Atomic Structure and Chemical Bonding
  • Atomic Identity Crisis — Understand atomic number, mass, and isotopes · Atomic Structure and Chemical Bonding
  • The Octet Rule Game — Arrange electrons to achieve stability · Atomic Structure and Chemical Bonding
  • Electron Transfer Party — Form ionic bonds by giving and taking · Atomic Structure and Chemical Bonding
  • Share to Win — Form covalent bonds by sharing electrons · Atomic Structure and Chemical Bonding
  • Triads, Octaves & The Search — Explore early classification attempts by Dobereiner and Newlands. · The Periodic Table
  • Mendeleev's Masterpiece — Arrange elements by mass and predict missing ones. · The Periodic Table
  • The Atomic Number Revolution — Why protons, not mass, define an element's identity. · The Periodic Table
  • Navigating the Modern Table — Understand groups, periods, and the layout of the table. · The Periodic Table
  • Alkali Metals: The Reactive Ones — Watch Group 1 metals explode in water. · The Periodic Table
  • Halogens: The Displacers — See how chlorine kicks out bromine and iodine. · The Periodic Table
  • Noble Gases: The Inert Crowd — Why Group 18 elements rarely react. · The Periodic Table
  • Hydrogen's Identity Crisis — Is it a metal or a non-metal? · Study of the First Element — Hydrogen
  • Splash! Metals Meet Water — From violent explosions to gentle bubbles. · Study of the First Element — Hydrogen
  • Acids, Alkalis & Hydrogen — Displacing hydrogen from dilute acids and hot alkalis. · Study of the First Element — Hydrogen
  • Lab Prep: Zinc & Acid — The standard method for collecting hydrogen gas. · Study of the First Element — Hydrogen
  • Industrial Hydrogen: Bosch Process — Making hydrogen from water gas on a large scale. · Study of the First Element — Hydrogen
  • Hydrogen for Hire — Every use is a property in disguise · Study of the First Element — Hydrogen
  • Oxidation vs Reduction — Adding oxygen or removing hydrogen. · Study of the First Element — Hydrogen
  • Hydrogen: The Reducer — Hydrogen removes oxygen from metal oxides. · Study of the First Element — Hydrogen
  • Restless Particles: Why Gases Push — See how molecular motion makes gases fill, squash and press · Study of Gas Laws
  • Squeeze Play: Boyle's Law — Halve the volume, double the pressure — at constant temperature · Study of Gas Laws
  • Balloon in the Sun: Charles' Law — Volume rises in step with kelvin temperature at constant pressure · Study of Gas Laws
  • The Coldest Cold: Absolute Zero — Meet −273°C, the floor of temperature, and the Kelvin scale · Study of Gas Laws
  • Two Dials at Once: The Gas Equation — Combine Boyle and Charles with P₁V₁/T₁ = P₂V₂/T₂ — and meet S.T.P. · Study of Gas Laws
  • The Stowaway in the Bubble — Correct for water vapour when a gas is collected over water · Study of Gas Laws
  • Dirty Air: Primary vs Secondary — Identify pollutants and their sources · Atmospheric Pollution
  • Lightning and Engines: NOx — How nitrogen oxides form in air · Atmospheric Pollution
  • NO to NO2: The Brown Gas — Oxidation of nitric oxide to nitrogen dioxide · Atmospheric Pollution
  • Sulfur to Sulfuric Acid — Combustion of sulfur fuels creates acid rain precursors · Atmospheric Pollution
  • Acid Rain vs Marble — Chemical attack on limestone and marble structures · Atmospheric Pollution
  • The Silent Killer — One fuel, two flames: CO₂ or CO · Atmospheric Pollution
  • The Greenhouse Effect — CO2 and Methane trap heat in the atmosphere · Atmospheric Pollution
  • Ozone: Shield or Smog? — Good ozone up high, harmful ozone at ground level · Atmospheric Pollution
  • CFCs Destroy Ozone — Chlorine radicals break down the ozone layer · Atmospheric Pollution
  • The Gas Detective — Match each gas to the test that unmasks it · Practical Work
  • Flame Test Fireworks — Read the metal from the colour of its flame · Practical Work
  • The Dilute Sulphuric Detective — One acid, four suspects, four tell-tale gases · Practical Work
  • The Hard Water Lab — Make stubborn water lather with one spoon of washing soda · Practical Work

Class 10

  • Build the Period 3 Atoms — Construct atoms from protons, neutrons, and electrons · Periodic Table, Periodic Properties and Variations of Properties
  • Shells Define the Period — Match electron shells to the correct period row · Periodic Table, Periodic Properties and Variations of Properties
  • Valence Electrons Rule Groups — Group elements by their outermost electron count · Periodic Table, Periodic Properties and Variations of Properties
  • Valency Jigsaw Puzzle — Use valency to snap ions into formulas · Periodic Table, Periodic Properties and Variations of Properties
  • Alkali Metals Reactivity — Observe how reactivity increases down Group 1 · Periodic Table, Periodic Properties and Variations of Properties
  • Halogen Reactivity Trends — Compare halogen displacement reactions to see trends · Periodic Table, Periodic Properties and Variations of Properties
  • Periodic Property Sim — Visualize atomic size and ionization energy trends · Periodic Table, Periodic Properties and Variations of Properties
  • The Noble Gas Goal — Why atoms want stable electron shells · Chemical Bonding
  • Electron Transfer Party — Metals lose, non-metals gain to form ions · Chemical Bonding
  • Ionic Formula Factory — Balance charges to write ionic formulas · Chemical Bonding
  • Melting Point Mystery — What sets ionic compounds apart from covalent ones. · Chemical Bonding
  • The Sharing Game — Non-metals share electrons to bond · Chemical Bonding
  • Dot Diagram Designer — Draw Lewis structures for covalent molecules · Chemical Bonding
  • The Lone Pair Gift — One atom donates both shared electrons · Chemical Bonding
  • Ionic vs Covalent Showdown — Rank substances by melting point — ionic beats covalent. · Chemical Bonding
  • The Hydronium Ion Mystery — Watch H₃O⁺ meet OH⁻ and vanish into water · Acids, Bases and Salts
  • pH Scale Detective — Line up everyday liquids along the pH scale. · Acids, Bases and Salts
  • Salt Formula Jigsaw — Match cations and anions to form neutral salts · Acids, Bases and Salts
  • Fizzy Acid Reactions — Name the gas each salt gives with dilute acid. · Acids, Bases and Salts
  • Perfect Neutralization Balance — Balance acid and base to form salt and water · Acids, Bases and Salts
  • Precipitation Party — Mix solutions to create insoluble salt precipitates · Acids, Bases and Salts
  • Detective: Salt Color Codes — Read a salt's identity from the colour of its ions. · Analytical Chemistry
  • NaOH Precipitate Lab — Identify a metal ion by the colour of its hydroxide. · Analytical Chemistry
  • Excess Alkali Mystery — Why do some precipitates dissolve in excess NaOH? · Analytical Chemistry
  • Ammonia vs NaOH Showdown — Tell ions apart by what dissolves in excess ammonia. · Analytical Chemistry
  • Ammonium Salt Test — Detect ammonium ions with heat and NaOH. · Analytical Chemistry
  • Amphoteric Metals React — Zinc and aluminium dissolve in both acids and alkalis, releasing hydrogen each time. · Analytical Chemistry
  • Amphoteric Oxides & Hydroxides — Sort oxides: amphoteric or basic? · Analytical Chemistry
  • Gay-Lussac's Volume Puzzle — Match gas volumes in simple integer ratios · Mole Concept and Stoichiometry
  • Avogadro's Equal Volumes — What Avogadro's law really tells you about gases. · Mole Concept and Stoichiometry
  • The 22.4 Litre Box — Turn a gas's mass into its volume at STP. · Mole Concept and Stoichiometry
  • Mole to Mass Converter — Link atomic mass to gram atomic mass · Mole Concept and Stoichiometry
  • Empirical Formula Detective — Deduce formulas from percentage composition · Mole Concept and Stoichiometry
  • Stoichiometry Reaction Lab — Calculate reactant and product masses/volumes · Mole Concept and Stoichiometry
  • Current Flow: Electrons vs Ions — Electrons or ions — how different things carry current. · Electrolysis
  • Ion Count: Strong vs Weak — Rank solutions by how well they conduct. · Electrolysis
  • Electrolysis Setup: Anode and Cathode — Identify electrodes, ions, and electron flow direction. · Electrolysis
  • Splitting Water: H₂ and O₂ — Electrolyze acidified water to produce hydrogen and oxygen. · Electrolysis
  • Melt It, Split It — Electrolyse molten lead bromide into its elements · Electrolysis
  • The Fading Blue Cell — Electrolyse copper sulphate with inert electrodes · Electrolysis
  • Treasure Hunt: Find the Ore — Match each ore to the metal it yields. · Metallurgy
  • Heat It Up: Roast or Calcine? — Convert sulfides and carbonates into metallic oxides using heat. · Metallurgy
  • Smelting: Carbon vs Hydrogen — Reduce metal oxides to pure metals using carbon or hydrogen. · Metallurgy
  • Bauxite Bath: Purify with NaOH — Dissolve bauxite in sodium hydroxide to remove impurities. · Metallurgy
  • Molten Magic: Extract Aluminium — Electrolyze alumina dissolved in cryolite to get pure aluminium. · Metallurgy
  • Alloy Alchemy: Mix for Strength — Combine metals to create stronger, more useful alloys. · Metallurgy
  • Lab Prep: Salt & Acid — Generate HCl gas from NaCl and conc. H2SO4 · Study of Compounds A. Hydrogen Chloride
  • Heavy Gas Challenge — Collect each gas the right way up. · Study of Compounds A. Hydrogen Chloride
  • The Acid Fountain — Demonstrate extreme solubility of HCl in water · Study of Compounds A. Hydrogen Chloride
  • White Fumes Mystery — Identify HCl using ammonia gas · Study of Compounds A. Hydrogen Chloride
  • Metal Clash: HCl — React HCl with active metals to release H2 · Study of Compounds A. Hydrogen Chloride
  • Neutralize the Oxides — React HCl with metal oxides and hydroxides · Study of Compounds A. Hydrogen Chloride
  • Carbonate Fizz Test — React HCl with carbonates to release CO2 · Study of Compounds A. Hydrogen Chloride
  • Precipitate the Chloride — Identify Cl- ions using silver and lead nitrate · Study of Compounds A. Hydrogen Chloride
  • Build the Ammonia Molecule — Explore covalent bonds and lone pairs in NH3 · Study of Compounds B. Ammonia
  • Lab Prep: Ammonia Gas — React ammonium chloride with slaked lime to make gas · Study of Compounds B. Ammonia
  • Nitrides Meet Water — Generate ammonia from magnesium nitride and water · Study of Compounds B. Ammonia
  • Haber's Process Simulator — Order the steps that make ammonia at scale. · Study of Compounds B. Ammonia
  • Fountain Experiment Logic — Why ammonia drives the fountain experiment. · Study of Compounds B. Ammonia
  • Ammonia vs Acids — Neutralize HCl, H2SO4, and HNO3 with ammonia · Study of Compounds B. Ammonia
  • Ammonia Redox Reactions — React ammonia with copper oxide and chlorine · Study of Compounds B. Ammonia
  • Aqueous Ammonia Tests — Identify metal ions using ammonium hydroxide · Study of Compounds B. Ammonia
  • From Lightning to Lab — Nature's acid and lab prep basics · Study of Compounds C. Nitric Acid
  • Build the HNO3 Molecule — Double, single, and a coordinate bond give nitrogen its valency of 5 · Study of Compounds C. Nitric Acid
  • Ostwald Process Simulator — Ammonia to nitric acid in 3 steps · Study of Compounds C. Nitric Acid
  • Neutralize with Nitric Acid — React acid with bases and carbonates · Study of Compounds C. Nitric Acid
  • Oxidizer vs Non-Metals — Watch carbon and sulfur get oxidized · Study of Compounds C. Nitric Acid
  • Metals Meet Nitric Acid — Copper and zinc react differently · Study of Compounds C. Nitric Acid
  • The Aqua Regia Mystery — Dissolving gold with mixed acids · Study of Compounds C. Nitric Acid
  • King of Chemicals Factory — Master the Contact Process steps · Study of Compounds D. Sulphuric Acid
  • Dilute Acid Lab Bench — React dilute H2SO4 with metals and salts · Study of Compounds D. Sulphuric Acid
  • Conc Acid Oxidizer — Watch carbon and copper get oxidized · Study of Compounds D. Sulphuric Acid
  • Sugar Char Challenge — See the dehydrating power of H2SO4 · Study of Compounds D. Sulphuric Acid
  • Non-Volatile Acid Swap — Prepare volatile acids from salts · Study of Compounds D. Sulphuric Acid
  • The Four Faces of Sulphuric Acid — One liquid — ordinary acid, oxidiser, dehydrator and acid-maker · Study of Compounds D. Sulphuric Acid
  • Carbon's Superpower: Tetravalency & Catenation — Build chains and rings with carbon atoms · Organic Chemistry
  • Hydrocarbon Family: Alkanes, Alkenes, Alkynes — Spot single, double, and triple bonds · Organic Chemistry
  • Alkane Action: Substitution with Chlorine — Watch methane swap hydrogen for chlorine · Organic Chemistry
  • Alkene Addition: Breaking Double Bonds — Add hydrogen or bromine to ethene · Organic Chemistry
  • Alkyne Lab: Making Ethyne — React calcium carbide with water · Organic Chemistry
  • Ethanol Factory: Synthesis Methods — Make ethanol from ethene or halides · Organic Chemistry
  • Ethanol Reactions: Sodium & Esterification — React ethanol with sodium and acetic acid · Organic Chemistry
  • Acetic Acid: Vinegar Chemistry — Test acidity and ester formation · Organic Chemistry
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