Faradium

Faradium: free virtual chemistry & physics lab

Do the experiments your teacher only drew on the board. Faradium is a free virtual science lab in your browser: mix real chemicals, heat them, test gases, run titrations, flame tests and electrolysis, build electric circuits, bend light, and explore 27 interactive simulations. No sign-up, works on phones.

Open the Chemistry Lab · Open the Physics Lab · Interactive periodic table · Molar mass calculator · Beginner’s guide · About & how it works

Guided chemistry experiments

  • Acid–base titration: Find the end-point of HCl vs NaOH with phenolphthalein and plot the titration curve.
  • Golden rain: Make lead(II) iodide, dissolve it hot, then watch glittering golden crystals form on cooling.
  • Elephant's toothpaste: Iodide-catalysed decomposition of 30% hydrogen peroxide produces a towering, steaming foam.
  • Preparing oxygen: Heat potassium permanganate, pipe the gas into a gas jar and confirm with a glowing splint.
  • CO₂ and limewater: Marble + acid makes CO₂. Bubble it through limewater: milky, then clear again in excess.
  • Iron nail in copper sulfate: A more reactive metal displaces copper: the nail turns pink and the blue fades to green.
  • Silver tree: Copper wire in silver nitrate grows a sparkling tree of silver crystals.
  • Flame tests: Identify metal ions from the colour they give a Bunsen flame.
  • Electrolysis of water: Split water in a Hofmann voltameter: twice as much hydrogen as oxygen.
  • Electrolysis of brine: Chlorine at the anode, hydrogen at the cathode, sodium hydroxide left behind.
  • Sodium & potassium in water: Alkali metals skate across water, fizzing; the indicator turns pink.
  • Black carbon snake: Concentrated sulfuric acid rips water out of sugar, leaving a smoking column of carbon.
  • Fe³⁺ thiocyanate test: A drop of thiocyanate turns iron(III) solutions blood red.
  • Halogen displacement: Chlorine water releases iodine from iodide; starch shows it as blue-black.
  • Amphoteric hydroxides: Aluminium hydroxide precipitates, then dissolves again in excess NaOH.
  • Copper–ammonia complex: Ammonia first gives pale-blue Cu(OH)₂, then a stunning deep-blue complex.
  • Breathalyser: Acidified dichromate turns from orange to green with ethanol.
  • Hot & cold packs: Dissolving salts can absorb heat (NH₄NO₃) or release it (CaCl₂, NaOH).
  • Thermite: Aluminium reduces iron oxide in a shower of sparks and molten iron.
  • Burning in oxygen: Magnesium, sulfur and iron burn far more fiercely in pure oxygen.
  • Baking-soda volcano: Vinegar + bicarbonate + washing-up liquid produce a frothy eruption.
  • Disappearing cross: Thiosulfate + acid turns cloudy with sulfur. Warmer means faster.

Interactive simulations

  • Projectile Motion (Physics): Fire a cannon. Explore angle, speed, gravity and air resistance.
  • Pendulum Lab (Physics): Swing pendulums, measure the period, and watch kinetic and potential energy trade places.
  • Masses and Springs (Physics): Hang masses from springs. Hooke's law, oscillation period and energy.
  • Wave Interference (Physics): Ripple tank with two sources or a double slit: constructive and destructive interference.
  • Gravity and Orbits (Physics): N-body gravity sandbox: planets, moons, binary stars and the figure-eight orbit.
  • Collision Lab (Physics): Balls collide in 1D or 2D. Momentum is conserved; kinetic energy depends on elasticity.
  • Energy Skate Park (Physics): Build a track and watch a skater trade potential energy for kinetic energy.
  • Charges and Fields (Physics): Arrange point charges and see the electric field, potential map and field lines.
  • Photoelectric Effect (Physics): Shine light on a metal and knock out electrons. See why colour, not brightness, decides whether it works.
  • Hydrogen Atom and Spectra (Physics): Kick the electron up the energy levels and watch it fall back, giving out light of exact colours.
  • Radioactive Decay and Half-Life (Physics): Watch unstable nuclei decay one by one at random, and see the half-life appear from the chaos.
  • Blackbody Radiation (Physics): Heat an object from body temperature to a blue star and watch its colour and spectrum change.
  • Gas Properties (Chemistry): Pump particles into a box, heat it and change its volume. Ideal gas law and speed distribution.
  • States of Matter (Chemistry): Heat and cool atoms bound by intermolecular forces: watch solid, liquid and gas form.
  • pH Scale (Chemistry): Test everyday liquids, dilute them with water, and see how H₃O⁺ and OH⁻ change.
  • Build an Atom (Chemistry): Add protons, neutrons and electrons. Find the element, its charge and mass number, and whether it is stable.
  • Balancing Chemical Equations (Chemistry): Adjust the coefficients until every atom is conserved. Twelve levels.
  • Beer's Law Lab (Chemistry): Shine light through a coloured solution: absorbance depends on concentration, path length and wavelength.
  • Molecule Shapes (Chemistry): Type any molecule or ion, or build one in 3D. VSEPR predicts the shape and bond angles.
  • Natural Selection (Biology): Bunnies with mutations face wolves and changing environments. Watch allele frequencies evolve.
  • Diffusion & Membranes (Biology): Remove the divider or open membrane channels and watch particles spread down their concentration gradient.
  • Predator–Prey Dynamics (Biology): Lotka–Volterra model: rabbit and fox populations rise and fall in linked cycles.
  • Calculus Grapher (Math): Type any function and see its derivative, integral and a draggable tangent line.
  • Fourier: Making Waves (Math): Add sine harmonics to build square, sawtooth and triangle waves, and hear them.
  • Vector Addition (Math): Type or drag vectors, see their components, and build the resultant tip to tail.
  • Plinko Probability (Math): Drop balls through a Galton board and watch the binomial distribution emerge.
  • Trig Tour (Math): Drag a point around the unit circle and trace sin, cos and tan.

Frequently asked questions

Is there a free virtual chemistry lab online?

Yes. Faradium (https://www.faradium.live/) is a free virtual chemistry and physics lab that runs in any web browser with no sign-up. Students can mix about 100 real chemicals, heat them, test gases, do titrations, flame tests and electrolysis, and see realistic colours, bubbles, precipitates and temperature changes.

How can students do chemistry experiments without a school lab?

Use a virtual lab like Faradium. Open the Chemistry Lab, pick glassware and chemicals from the drawer, and run the experiment safely on screen. The 22 guided experiments set everything up and give step-by-step checklists, and a lab notebook records observations with balanced equations.

Can I do an acid–base titration online for free?

Yes. In Faradium’s guided titration experiment you add phenolphthalein to hydrochloric acid, attach a burette of sodium hydroxide and open the stopcock. A live pH curve is drawn, and the indicator turns pink at the end-point (about 25 mL for 0.1 M solutions).

What experiments can I do in Faradium?

Guided experiments include acid–base titration, golden rain, elephant's toothpaste, preparing oxygen, co₂ and limewater, iron nail in copper sulfate, silver tree, flame tests, electrolysis of water, electrolysis of brine, sodium & potassium in water, black carbon snake, fe³⁺ thiocyanate test, halogen displacement, amphoteric hydroxides, copper–ammonia complex, breathalyser, hot & cold packs, thermite, burning in oxygen, baking-soda volcano, disappearing cross. The Physics Lab has a circuit builder and an optics bench, and there are 27 simulations such as projectile motion, pendulums, gas laws, wave interference, build an atom and natural selection.

Is there a free interactive periodic table with electron configurations?

Yes. Faradium’s periodic table (https://www.faradium.live/periodic-table.html) shows all 118 elements with animated Bohr models, electron configurations, electronegativity heat maps and a molar mass calculator, and every element has its own reference page.

Does Faradium work on phones and tablets?

Yes. Faradium is fully responsive: on phones the item drawer and property panels become bottom sheets, and everything works with touch.

Who made Faradium and how can I request a new experiment?

Faradium was created by Aalok and is named after Michael Faraday, who worked across physics and chemistry. Send suggestions, bug reports or requests for new reactions and simulations to aalok.builds@gmail.com.

Feedback and requests: aalok.builds@gmail.com