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.
This chemistry topic keeps one coherent recipe bench in view instead of splitting stoichiometry into detached worksheet pages. Stoichiometric Ratios and Recipe Batches fixes the idea of a complete reaction batch first, Limiting Reagent and Leftover Reactants turns the lower batch cap into a visible excess-versus-limiting story, and Percent Yield and Reaction Extent keeps the same theoretical marker and actual product tray together so yield remains tied to the same reaction run.
Best first concepts
The topic page keeps these starts in their own compact row so the first screen is about orientation and next action, not stacked feature cards.
Keep one reaction recipe visible so stoichiometric ratios read as complete batches, not detached worksheet proportions.
Recipe batches
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Use one recipe bench to see which reactant caps the output first and why the other reactant can remain in excess.
Limiting and excess reactants
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Compare actual output with the same theoretical recipe cap so percent yield stays visual and honest on one shared bench.
Actual vs theoretical output
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Specific learning goals
These goal cards stay authored and transparent. They reuse the current topic page, starter tracks, guided collections, concept bundles, and progress cues instead of adding a separate recommendation system on top of this branch.
Use the stoichiometry-and-yield topic route, the new lesson set, the compact starter track, and the solutions-and-pH topic page so chemistry quantities stay visual instead of becoming detached worksheet algebra.
Primary move
Open topic route
No saved progress yet inside Stoichiometry and Yield.
Entry diagnostic
Start from the opening step
No saved diagnostic checks are available yet, so the opening step is still the best entry into the collection.
Reuses the guided collection entry for Stoichiometry and Yield Lesson Set, with 0 of 2 probes already ready.
No saved progress yet inside Stoichiometry and Yield.
Open the stoichiometry-and-yield topic route is the next guided collection step.
Stoichiometric Ratios and Recipe Batches opens this track and sets up the rest of the path.
No saved progress yet inside Solutions and pH.
Grouped concept overview
Each group is authored in the topic catalog, but the actual concepts, progress badges, and track cues still come from the canonical concept metadata and shared progress model.
Group 01
Start with one visible batch recipe, then keep the lower cap line and leftover trays on the same bench so limiting reagent reads as a direct consequence of complete batches.
用同一個反應配方實驗台讓化學計量比讀起來像完成一批批反應，而不是脫離情境的工作紙比例。
Strong first stop for getting into this topic without scanning the whole library.
用同一個配方實驗台看清哪個反應物先限制產量，以及為何另一個反應物會留下過量。
Strong first stop for getting into this topic without scanning the whole library.
Group 02
Keep the same recipe and limiting story, then compare the ideal product marker with the actual tray so percent yield stays attached to the same reaction run.
把實際產出與同一配方下的理論上限並列，讓百分產率在同一個實驗台上保持可視與誠實。
Strong first stop for getting into this topic without scanning the whole library.