Safety boundary
Use paper-token models, supplied calculations, and simulations only. No unsupervised chemical reactions are required.
Explicit chemistry instruction
This investigation uses supplied or simulated data only. Preserve initial reactant quantities before any stoichiometric calculation.
Determine the limiting reactant, theoretical yield, actual yield, and percent yield in that order.
Compare the result with uncertainty and identify one model or procedural explanation for the discrepancy.
Vocabulary: reaction dataset; limiting reactant; theoretical yield; actual yield; percent yield.
Worked example
Reactant data predict 5.00 g theoretical product; simulated actual yield is 4.35 g, giving 87.0%.
Guided question
Which calculation must be completed before percent yield can be interpreted?
Independent work
- Preserve raw reactant quantities.
- Identify the limiting reactant.
- Calculate theoretical and percent yield.
- Write one uncertainty statement and one revision.
Investigation / Data Lab
Use supplied or simulated data only. Preserve raw reactant quantities, conversion chain, limiting-reactant decision, theoretical/actual yield, uncertainty, and revision.
Misconception check
A percent-yield result without the limiting-reactant calculation is not traceable.
Formative check
What makes a yield analysis reproducible?
Reveal response
Raw amounts, balanced equation, conversion chain, actual yield, and uncertainty.
Mentor evidence conference
Ask Archaemenes to audit the limiting-reactant logic, conversion chain, and evidence interpretation.
Teacher guidance
Foundation: Use supplied data and a scaffold.
Core: Complete the full yield analysis.
Extended: Quantify sensitivity to measurement uncertainty.