Safety boundary
Use virtual equilibrium perturbations and supplied datasets only; no unsupervised color-change chemistry.
Explicit chemistry instruction
Record the instant response and the slower compositional adjustment separately.
Compare concentration, pressure, or temperature perturbations under controlled conditions.
Use graphs to identify old and new equilibrium plateaus.
Vocabulary: perturbation; transient; plateau; relaxation; controlled variable.
Worked example
A concentration spike occurs instantly when reactant is added, then partially relaxes as reaction proceeds to a new plateau.
Guided question
Which graph feature distinguishes immediate addition from reaction response?
Independent work
- Preserve before/during/after data.
- Annotate disturbance time.
- Predict and verify shift direction.
- Record one mismatch or limitation.
Investigation / Data Lab
Preserve before/during/after data, annotated graphs, uncertainty, and one revision.
Misconception check
The immediate concentration jump is not itself the equilibrium shift; the subsequent reaction response is.
Formative check
What marks re-established equilibrium?
Reveal response
New constant concentrations with equal forward and reverse rates.
Mentor evidence conference
Ask Archaemenes to audit whether Q, K, and rate effects are being kept distinct.
Teacher guidance
Foundation: Use supplied graphs.
Core: Analyze transients and plateaus.
Extended: Compare Q/K predictions with simulation.