Safety boundary
Use simulations and supplied concentration data only; no unsupervised reactive mixtures.
Explicit chemistry instruction
Record forward and reverse rates and concentrations over time.
Identify when rate equality emerges and whether concentration curves plateau.
Perturb initial amounts and compare the new approach without assuming the same transient path.
Vocabulary: simulation; rate equality; plateau; transient; uncertainty.
Worked example
A simulation shows rates converging to 0.15 while concentrations level at different values; this is dynamic equilibrium evidence.
Guided question
Which graph directly tests the equal-rate criterion?
Independent work
- Preserve raw time/rate/concentration data.
- Identify equilibrium interval.
- Compare two starting conditions.
- Record one limitation.
Investigation / Data Lab
Use an equilibrium simulation to track forward/reverse rates and concentration plateaus.
Preserve raw concentrations/rates, graphs, uncertainty, and one revision.
Misconception check
A flat concentration graph alone does not reveal whether a reversible microscopic process continues; rate evidence strengthens the claim.
Formative check
What two graph features support dynamic equilibrium?
Reveal response
Constant concentrations and equal forward/reverse rates.
Mentor evidence conference
Ask Archaemenes to audit equilibrium assumptions, graph interpretation, and whether the evidence supports the conclusion.
Teacher guidance
Foundation: Use supplied graphs.
Core: Analyze rate and concentration together.
Extended: Compare approach-to-equilibrium transients.