🎓 Ages 15–18 · Grades 9–12 · Chemistry

ReactQuest

Chemistry makes sense when you predict the number and then check it. Here you read a scenario — a dilution, a mole conversion, a pH, a gas volume — commit to an answer, and a deterministic engine computes the real result and shows the working. No jargon, nothing sent anywhere, and a wrong prediction is just where the understanding starts.

The Reaction Lab ★ the main event

Read a scenario across the mole, solutions, gas-law, acid–base, stoichiometry and thermochemistry topics — predict the result, then a pure engine computes it exactly and walks the relationship. Because it’s computed, not animated, the answer is always right.

Open the Reaction Lab →

Who you’ll meet

Not mascots — everyday chemists, each showing one idea in action. You’ll run into them across the lab and the kits.

  • Dmitri — reads the periodic table for trends (periodicity)
  • Halden — balances equations and counts moles (stoichiometry)
  • Perrin — relates pressure, volume, moles, and temperature (gas laws)
  • Nerys — mixes and dilutes to a target concentration (solutions)
  • Yuki — tracks how fast a reaction goes (kinetics)
  • Basil — finds the balance point of a reaction (equilibrium)
  • Osric — measures acids and bases by pH
  • Anwyn — follows the heat in and out of a reaction (thermochemistry)
  • Tobias — tracks electrons gained and lost (redox)
  • Sabina — the mentor — predict, compute, then reason about the chemistry

Check what you know

Sixteen short kits — atomic structure, periodic trends, bonding, nomenclature, moles, limiting reagent, gas laws, solutions, reaction types, kinetics, equilibrium, acids & bases, thermochemistry, redox, organic — anchored to HS chemistry. Hints when you want them; progress stays on this device.

1. Atomic Structure Atomic structure — protons, neutrons, electrons, isotopes · 25 questions 2. Periodic Trends Periodic trends — organization and predictable patterns · 25 questions 3. Bonding Chemical bonding — ionic, covalent, and Lewis structures · 25 questions 4. Nomenclature & Formulas Naming compounds and writing chemical formulas · 25 questions 5. The Mole & Stoichiometry The mole and stoichiometry — quantitative chemistry · 25 questions 6. Limiting Reagent Limiting reagent and percent yield · 25 questions 7. Gas Laws Gas laws — pressure, volume, temperature relationships · 25 questions 8. Solutions & Concentration Solutions and concentration — molarity and dilution · 25 questions 9. Reaction Types Reaction types — recognizing patterns of chemical change · 25 questions 10. Kinetics Kinetics — reaction rate and collision theory · 25 questions 11. Equilibrium Chemical equilibrium and Le Chatelier's principle · 25 questions 12. Acids & Bases Acids, bases, and pH · 25 questions 13. Thermochemistry Thermochemistry — energy changes in reactions · 25 questions 14. Redox Redox — oxidation, reduction, and electron transfer · 25 questions 15. Intro Organic Introductory organic chemistry — carbon and functional groups · 25 questions 16. Capstone: Run the Lab Capstone — integrating stoichiometry, energy, and equilibrium · 25 questions

How it works

ReactQuest trusts you — it’s about reasoning with the relationships, not memorizing them, and a wrong prediction is just a place to learn. Every answer is computed by a small deterministic engine (no server, nothing sent anywhere). Your progress is saved only on this device: no accounts, no ads.