Your Virtual Chemistry Lab

Four fully interactive experiments — mix compounds, electrolyze water, titrate acids, ignite fuels. All with real chemistry, live pH, and an AI tutor.

🧪 55+ Chemicals

⚗️ 25+ Reactions

🔬 6 Experiments

🤖 AI Tutor

📊 Completed: 0/6

🧪

Free Mix Lab

Beginner

Pick any two of 55+ compounds and watch the reaction. pH shifts, animations, colour changes — and learn what happened.

55+ ChemicalspH LiveOpen

⚡

Electrolysis of Water

Intermediate

Apply voltage to split H₂O into H₂ and O₂. Watch gas collecting at each electrode, control voltage, and measure Faraday efficiency.

ElectrolysisRedoxFaraday

🌡️

Acid-Base Titration

Intermediate

Add NaOH drop by drop into HCl. Watch the pH curve build in real time, find the equivalence point, and learn about indicators.

TitrationpH CurveEquivalence

🔥

Combustion Reaction

Advanced

Choose a hydrocarbon fuel, ignite it, and measure CO₂, H₂O output and temperature. See complete vs incomplete combustion.

CombustionHydrocarbonsTemperature

🔥

Flame Test Lab

Beginner

Heat metal compounds in a Bunsen burner and identify ions from their distinctive flame colours. Includes unknown identification challenge and emission spectra.

8 Metal IonsSpectraQualitative Analysis

📈

Rates of Reaction

Intermediate

Na₂S₂O₃ + HCl disappearing cross experiment. Vary concentration, temperature and add a catalyst — watch the rate graph build in real time.

Collision TheoryArrheniusRate Graph

Chemicals

All Acid Base Salt Oxide Gas Organic Other

Steps

1

Pick a chemical

2

Pick more (2+ to mix)

3

Click Mix Chemicals

4

View results

Tap to go to the lab and mix

Select 2 or more chemicals to begin

Nothing selected

pH Level

036791214

—

Select chemicals

25°C

Temp

—

ΔH kJ/mol

⚠️ Dangerous combination — extreme caution in real lab!

Results

Learn

AI Chat

🔬

Pick 2 or more chemicals and mix them to see the reaction here.

🤖

Hi! I'm ChemBot 🧪 Select any two chemicals and mix them — then ask me anything about the reaction!

Electrolysis of Water

2H₂O(l) → 2H₂(g) + O₂(g) — powered by electric current

⚡ Power Settings

Voltage 6.0 V

Electrolyte (H₂SO₄ %) 5%

0.0

H₂ mL

0.0

O₂ mL

0.0

mA Current

—

Efficiency

Results

Learn

AI Chat

⚡

Start electrolysis to see live results. Adjust voltage and electrolyte concentration to change the rate.

⚡ What is Electrolysis?

Electrolysis uses electrical energy to drive a non-spontaneous chemical reaction. A direct current is passed through a liquid electrolyte, causing ions to migrate toward oppositely charged electrodes.

🔵 At the Cathode (−)

Reduction occurs: 2H₂O + 2e⁻ → H₂↑ + 2OH⁻. Water molecules gain electrons and hydrogen gas is produced. H₂ forms at twice the rate of O₂.

🟡 At the Anode (+)

Oxidation occurs: 2H₂O → O₂↑ + 4H⁺ + 4e⁻. Water molecules lose electrons and oxygen gas is released. Volume ratio H₂:O₂ = 2:1.

📐 Faraday's Laws

The mass/volume of gas produced is proportional to the charge passed (Q = I × t). Higher voltage = more current = faster gas production.

🌍 Real Applications

Green hydrogen fuel production, chlor-alkali industry (making NaOH and Cl₂), electroplating, and aluminium smelting all rely on electrolysis.

🤖

Hi! Start the electrolysis and ask me anything about what's happening at each electrode, Faraday's laws, or how this is used in industry! ⚡

Acid-Base Titration

Add NaOH from the burette drop by drop into HCl — find the equivalence point

Burette

0.0 mL added

2.0

Strongly Acidic

NaOH added: 0.0 mL

HCl initial2.50 mmol

NaOH added0.00 mmol

ExcessH+ 2.50 mmol

Neutralization: 0%

pH vs Volume NaOH Added

Results

Learn

AI Chat

🌡️

Add drops of NaOH to the HCl flask. The pH will change with each drop — find the equivalence point!

🌡️ What is Titration?

Titration determines unknown concentration by adding a known solution until the reaction is complete. The equivalence point is when moles of acid = moles of base.

📈 The pH Curve

Near the equivalence point, pH jumps sharply — this is the inflection point. Strong acid + strong base gives an equivalence point right at pH 7.

🌈 Indicators

Phenolphthalein turns pink above pH 8.2. Methyl orange turns yellow above pH 4.4. Your choice of indicator should bracket the equivalence point.

🌍 Applications

Titration is used in food science (acidity in wine/milk), pharmaceuticals (drug purity), water treatment, and industrial quality control.

🤖

Hi! Start the titration by adding drops. Ask me anything about equivalence points, pH curves, or indicators! 🌡️

Combustion Reactions

Select a fuel, adjust oxygen supply, and ignite — observe temperature and products

Choose Fuel

Methane (CH₄)

Ethanol (C₂H₅OH)

Propane (C₃H₈)

Glucose (C₆H₁₂O₆)

O₂ Supply

Excess (Complete) Limited (Incomplete)

25°C

Temperature

Products Formed

0

g CO₂

0

g H₂O

—

g CO (incomplete)

0

kJ Energy

Results

Learn

AI Chat

🔥

Select a fuel and ignite it to see the combustion products, temperature rise, and balanced equation.

🔥 What is Combustion?

Combustion is a rapid exothermic reaction between a fuel and oxygen. Complete combustion produces CO₂ and H₂O. Incomplete combustion also produces CO and soot.

⚗️ Complete vs Incomplete

Complete: plenty of O₂ → CO₂ + H₂O. Incomplete: limited O₂ → CO + H₂O + soot. CO is toxic and is why car exhausts are dangerous in enclosed spaces.

🌡️ Energy Release

Combustion releases the chemical energy stored in C-H and C-C bonds. Methane releases ~890 kJ/mol. This is the basis of all fossil fuel energy.

🌍 Applications & Impact

Combustion powers cars, planes, and power stations. It also produces CO₂ — the primary greenhouse gas driving climate change.

🤖

Hi! Select a fuel and ignite it. Ask me about combustion equations, energy release, climate impact, or anything else! 🔥

Flame Test Identification

Heat metal compounds in a Bunsen burner — identify the metal ion from its distinctive flame colour

—

Select a compound to begin

Emission Spectrum (380–750 nm)

380450520590660750nm

🎯 Unknown Identification Challenge

A mystery compound produces this flame colour. Which metal ion is it?

Results

Learn

AI Chat

🔥

Select a metal compound and heat it to see the flame colour and identification results here.

⚛️ Why do flames change colour?

When atoms are heated, electrons absorb energy and jump to higher energy levels. When they fall back down, they emit light at specific wavelengths — giving each element a unique colour fingerprint.

🌈 Emission Spectra

Each element has a unique set of spectral lines — like a barcode. Sodium has a famous doublet at 589nm (yellow). Hydrogen has 4 visible lines (Balmer series). These are used in telescopes to identify distant stars!

🔬 Qualitative Analysis

Flame tests identify metal ions in solution. You dip a platinum wire loop into the sample and hold it in a hot non-luminous flame. The colour tells you the cation present.

🎆 Real World: Fireworks!

Firework colours are entirely based on flame test chemistry: Sr = red, Ba = green, Cu = blue, Na = yellow, K = purple. Different metal salts are packed into stars that burn at specific temperatures.

🔭 Astronomy Application

Astronomers use spectroscopy to identify elements in distant stars. The same emission lines we see in the lab appear in starlight — this is how we know what stars are made of without ever visiting them!

⚠️ Lab Safety

Real flame tests require: safety goggles, lab coat, hair tied back, flameproof mat. Never point the burner at others. Barium compounds are toxic — avoid inhalation.

🤖

Hi! Heat a metal compound and I'll explain the quantum physics behind its flame colour, emission spectrum, and real-world applications! 🔥

Rates of Reaction

Na₂S₂O₃ + 2HCl → 2NaCl + SO₂↑ + S↓ + H₂O — time how long the cross takes to disappear

Conical Flask

✕

Cross disappears when sulfur precipitates

Variables

[Na₂S₂O₃] 0.15 mol/L

Temperature 25°C

Add MnO₂ catalyst

—

Time (s)

—

Rate (s⁻¹)

Rate vs Concentration Graph (run multiple experiments)

Results

Learn

AI Chat

📈

Start the reaction and time how long until the cross disappears. Run multiple experiments with different conditions to build your rate graph.

💥 Collision Theory

Reactions happen when particles collide with enough energy (activation energy Eₐ) and correct orientation. Anything that increases the frequency or energy of successful collisions increases the rate.

🌡️ Temperature Effect

Increasing temperature by 10°C roughly doubles the rate (rule of thumb). The Arrhenius equation: k = Ae^(-Eₐ/RT). More particles have energy ≥ Eₐ, and collisions are more frequent.

⚗️ Concentration Effect

Higher concentration → more particles per unit volume → more frequent collisions → faster rate. Rate ∝ [Na₂S₂O₃] for this reaction (first-order in thiosulfate).

🔬 Catalyst Effect

Catalysts provide an alternative reaction pathway with lower activation energy. MnO₂ acts as a heterogeneous catalyst here, adsorbing reactants on its surface and weakening bonds. It is not consumed in the reaction.

📐 Rate Equation

Rate = k[Na₂S₂O₃]ⁿ[HCl]ᵐ. Experimentally, rate is first-order in thiosulfate (n=1). The rate constant k increases with temperature following the Arrhenius equation.

⚠️ Safety Note

Sulfur dioxide (SO₂) is produced — a toxic, irritating gas. Carry out in a well-ventilated area or fume hood. Avoid inhaling the mixture. Wear goggles and gloves.

🤖

Hi! Run the experiment with different concentrations and temperatures to build your rate graph. Ask me about collision theory, the Arrhenius equation, or how to calculate the rate constant! 📈