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.

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Starter track2 concepts50 min2 checkpoints

反應速率與平衡

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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.

1反應速率／碰撞理論

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2動態平衡／勒沙特列原理

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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

化學計量與產率

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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.

1化學計量比與反應配方批次

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2限量試劑與剩餘反應物

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3百分產率與反應進度

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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

溶液與 pH

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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.

1濃度與稀釋

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2溶解度與飽和

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3酸鹼／pH 直覺

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4緩衝液與中和

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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 tracks

反應速率與平衡

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 tracks

化學計量與產率

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 tracks

溶液與 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