EDUCATION DECISION WORKBENCH
Trace a concentration, pressure, volume, temperature, or catalyst stress through a visible Le Chatelier reasoning path.
Review output
Load the worked example to inspect realistic inputs, or enter anonymous, policy-approved information. Results remain in this browser tab until you copy or download them.
Transparent method
Concentration increase shifts away from the side receiving species; removal shifts toward it. Pressure increase or volume decrease favors the side with fewer total gaseous coefficients, while expansion favors more. For an exothermic forward reaction, heat is a product; for an endothermic forward reaction, heat is a reactant. A catalyst changes forward and reverse rates without changing K or equilibrium position. A direction describes the response that partially opposes the applied stress. It does not mean all reactant becomes product or that the favored side has the larger equilibrium concentration. A no-position-shift result may arise from equal gaseous coefficients or catalyst addition, even though collision rates or the time to reach equilibrium can change. Quantitative claims require K, Q, temperature, and starting composition.
Confirm the question, variables, units, source data, measurement precision, and the model expected by the current course or laboratory. Keep an untouched copy of observations before excluding or transforming any value.
Run the worked example first, inspect every intermediate row, compare units and signs, and look for a result that conflicts with the graph, physical system, chemical equation, or learning objective.
Record the method, assumptions, units, rounding, data limitations, and any excluded observations. Compare the exported report with an independent calculation or approved reference before assessment or laboratory use.
How to interpret the result
Use this analyzer after a reversible equation and heat direction are known. It supports equilibrium lessons, scenario comparison, and checking a written explanation against Le Chatelier reasoning. It is especially useful when learners confuse reaction rate with equilibrium position or assume every stress causes a shift. It does not calculate an equilibrium constant, reaction quotient, composition, yield, or time to equilibrium.
The Haber-process example treats the forward reaction as exothermic and compares four moles of reactant gas with two moles of product gas. Increasing pressure is modeled as compression, so the system favors the product side with fewer gas particles. The result table shows the heat model, entered stress, gas-coefficient evidence, selected rule, and predicted response rather than displaying an unsupported arrow.
Concentration increase shifts away from the side receiving species; removal shifts toward it. Pressure increase or volume decrease favors the side with fewer total gaseous coefficients, while expansion favors more. For an exothermic forward reaction, heat is a product; for an endothermic forward reaction, heat is a reactant. A catalyst changes forward and reverse rates without changing K or equilibrium position.
A direction describes the response that partially opposes the applied stress. It does not mean all reactant becomes product or that the favored side has the larger equilibrium concentration. A no-position-shift result may arise from equal gaseous coefficients or catalyst addition, even though collision rates or the time to reach equilibrium can change. Quantitative claims require K, Q, temperature, and starting composition.
Do not count aqueous species in the pressure rule, use unbalanced coefficients, treat temperature like a concentration without locating heat, claim a catalyst increases product yield, or combine simultaneous stresses into one unexplained answer. State which condition changed, show the relevant side or gas counts, distinguish speed from position, and verify whether the reaction model and phase labels are complete.
Learning boundary
This browser-local workbench calculates only from the entered model and observations. It cannot validate an experiment, balance an equation, establish causation, certify laboratory safety, diagnose learning, or replace the method required by a teacher, curriculum, laboratory, or institution.
Review checklist
Practical questions
No. The calculation runs in the current browser tab. Avoid personal information and retain laboratory data in the system authorized by the school.
Treat it as an editable analysis aid. Show your own reasoning, cite the required sources, follow academic-integrity rules, and use the method requested by your course.
No. Check dimensions, graph shape, assumptions, measurement uncertainty, significant figures, and whether another model explains the observations better.
YOUR NIRMION
