Simulations
Browse by topic. Click a heading to expand a category, then click a simulation to open it. Each simulation comes with teaching notes and a guided walkthrough.
▶ Kinetic Theory of Matter 3 simulations
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State Changes
Simulations of particles and their state changes. GCSE Open → -
HCl and NH3 Diffusion Tube
Animated diffusion tube for the reaction between hydrogen chloride and ammonia. Temperature, air particles and reactant particles can be adjusted. GCSE Open → -
Brownian MotionNew
Brown's original 1827 experiment. A pollen grain moving randomly on the surface of water. GCSE Open →
▶ Rates/Kinetics 2 simulations
▶ Equilibrium 1 simulation
▶ Acids & Bases 3 simulations
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Acid–Base TitrationNew
Run a virtual titration for a range of acids, alkalis and indicators, and plot the pH curve. A-level Open → -
Buffer SolutionsNew
Add acid or base to a buffer and to two unbuffered comparisons at once, and watch how much less the buffer's pH changes. A-level Open → -
Weak Acid pH — Approximation vs ExactNew
Compare the simplifying assumption [H+]=[A-], [HA]=[HA]0 against the exact pH for a weak acid. Ka and acid concentration can be varied. A-level Open →
▶ Organic 1 simulation
▶ Quantum 5 simulations
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Atomic Orbitals Density
Density plots of atomic orbitals as electron positions are sampled. Pre-University Open → -
Molecular Orbital Formation - HydrogenNew
Formation of molecular orbitals from two 1s orbitals for hydrogen and helium molecules. Pre-University Open → -
Molecular Orbital Formation - s and p OrbitalsNew
Formation of molecular orbitals from two 1s and 2p orbitals. Pre-University Open → -
Molecular Orbital Formation - Homonuclear Diatomic MoleculesNew
Molecular orbital diagrams for H₂ and the Period 2 homonuclear diatomic molecules. Pre-University Open → -
Molecular Orbital Formation - Heteronuclear Diatomic MoleculesNew
Molecular orbital diagrams for Period 2 heteronuclear diatomic molecules. Pre-University Open →