Subject entry3 topics9 concepts3 starter tracks217 min

Chemistry

Enter the current chemistry slice through reaction-rate ideas, a stoichiometry-and-yield recipe branch, and a broader solutions-and-pH branch without leaving the same simulation-first product architecture.

Chemistry is still compact, but it is no longer just a pair of isolated branches. This subject now frames a rates-and-equilibrium branch, a stoichiometry-and-yield branch built around one shared recipe bench, and a solutions-and-pH branch that carries amount, solubility, pH, and buffers on the same bounded chemistry shelf.

Start Rates and Equilibrium Open Rates and Equilibrium New here? Start here Search Chemistry Browse Chemistry concepts

Starter tracks

Start with a bounded path before branching wider.

Open concept library

Starter track2 concepts50 min2 checkpoints

Rates and Equilibrium

Track not started

Start with successful collisions setting reaction rate, then reuse the same chemistry language inside a reversible system that re-balances after a disturbance.

Successful collisionsTemperature vs concentrationDynamic equilibriumShift to a new balance

Track progress

0 of 4 moments complete

0 of 2 concepts complete and 0 of 2 checkpoints cleared.

1Reaction Rate / Collision Theory

Start here

2Dynamic Equilibrium / Le Chatelier's Principle

Ahead

Reaction Rate / Collision Theory opens this track and sets up the rest of the path.

Start track Jump to Reaction rate

Starter track3 concepts72 min2 checkpoints

Stoichiometry and Yield

Track not started

Start with one visible reaction recipe, use the lower batch cap to identify the limiting reagent, and then compare actual output with the same theoretical marker.

Recipe batchesLimiting reagentLeftover reactantActual vs theoretical output

Track progress

0 of 5 moments complete

0 of 3 concepts complete and 0 of 2 checkpoints cleared.

1Stoichiometric Ratios and Recipe Batches

Start here

2Limiting Reagent and Leftover Reactants

Ahead

3Percent Yield and Reaction Extent

Ahead

Stoichiometric Ratios and Recipe Batches opens this track and sets up the rest of the path.

Start track Jump to Recipe ratios

Starter track4 concepts95 min4 checkpoints

Solutions and pH

Track not started

Start with concentration in one beaker, add solubility limits and saturation, then reuse that same solution language to read pH, buffers, and neutralization.

Amount in volumeDilution without losing soluteSolubility limit and excess solidpH as a live scaleBuffer reserve and neutralization

Track progress

0 of 8 moments complete

0 of 4 concepts complete and 0 of 4 checkpoints cleared.

1Concentration and Dilution

Start here

2Solubility and Saturation

Ahead

3Acid-Base / pH Intuition

Ahead

4Buffers and Neutralization

Ahead

Concentration and Dilution opens this track and sets up the rest of the path.

Start track Jump to Concentration

Topics

Use topics when you want the subject shaped into a clearer map.

TopicChemistry2 concepts50 min1 starter track

Rates and Equilibrium

Use one compact chemistry branch where collision success explains reaction rate first, then the same particle language widens into reversible change and a new equilibrium mix.

Collision theoryEquilibrium shifts

Best first concepts

Reaction rate Dynamic equilibrium

Open topic Start Reaction rate

TopicChemistry3 concepts72 min1 starter track

Stoichiometry and Yield

Use one compact chemistry branch where a visible recipe bench connects stoichiometric ratios, limiting reagent, and percent yield without leaving the same particle-and-recipe language.

Recipe batchesLimiting and excess reactantsActual vs theoretical output

Best first concepts

Recipe ratios Limiting reagent Percent yield

Open topic Start Recipe ratios

TopicChemistry4 concepts95 min1 starter track

Solutions and pH

Use one compact chemistry branch where concentration, solubility, acid-base balance, buffers, and pH all stay attached to the same bounded solution story.

How crowded the solution isDissolving limitsAcid-base balance

Best first concepts

Concentration Solubility pH intuition

Open topic Start Concentration

Best first concepts

Start with one strong concept when you do not need the full path yet.

ChemistryRates and Equilibrium

Reaction Rate / Collision Theory

Keep one chemistry box visible so temperature, concentration, activation threshold, and catalysts can be read as changes in successful collisions instead of chemistry slogans.

Open Reaction rate

ChemistryRates and Equilibrium

Dynamic Equilibrium / Le Chatelier's Principle

Watch a reversible chemistry bench keep changing microscopically while the mixture settles toward a new balance after each disturbance.

Open Dynamic equilibrium

ChemistryStoichiometry and Yield

Stoichiometric Ratios and Recipe Batches

Keep one reaction recipe visible so stoichiometric ratios read as complete batches, not detached worksheet proportions.

Open Recipe ratios

ChemistryStoichiometry and Yield

Limiting Reagent and Leftover Reactants

Use one recipe bench to see which reactant caps the output first and why the other reactant can remain in excess.

Open Limiting reagent

ChemistryStoichiometry and Yield

Percent Yield and Reaction Extent

Compare actual output with the same theoretical recipe cap so percent yield stays visual and honest on one shared bench.

Open Percent yield

ChemistrySolutions and pH

Concentration and Dilution

Use one beaker to separate how concentration changes when you add solvent from how it changes when you add more solute.

Open Concentration

ChemistrySolutions and pH

Solubility and Saturation

Keep dissolved amount, excess solid, and current capacity in one beaker so saturation reads like a visible limit instead of a slogan.

Open Solubility

ChemistrySolutions and pH

Acid-Base / pH Intuition

Keep acid amount, base amount, water, and the pH strip visible together so acidity and basicity stay intuitive rather than memorized.

Open pH intuition

ChemistrySolutions and pH

Buffers and Neutralization

Keep neutralization, buffer reserve, and the pH strip visible together so steady pH does not look like unchanged chemistry.

Open Buffers