STEM PRACTICE AND EVIDENCE WORKBENCH
Calculate actual-to-theoretical yield and audit both learner percentages and above-theoretical classifications.
Review output
Load the worked example to inspect realistic inputs, or enter anonymous classroom or laboratory evidence. Results remain in this browser tab until you copy or download them.
Transparent method
Percent yield equals actual yield divided by theoretical yield times one hundred. At or below theoretical corresponds to a result no greater than 100 percent; above theoretical is a review flag. Numerical percentage and classification must both match within tolerance for the learner claim to be supported. Supported means the learner used the correct ratio and classified the result consistently. A value above 100 percent can reveal incomplete drying, contamination, wrong product form, incorrect theoretical yield, calibration error, or unit mismatch. A value below 100 percent can reflect transfers, side reactions, equilibrium, decomposition, solubility, or incomplete reaction.
Confirm the question, source, units, notation, response coding, model assumptions, and review threshold. Keep an unchanged copy of the original evidence.
Run the worked example, inspect every intermediate row, and compare it with a hand calculation, diagram, representation, or approved subject method.
Record the method, assumptions, units, classifications, and flagged rows. Verify the editable report independently before educational or laboratory use.
How to interpret the result
Use after theoretical yield has been calculated from a balanced reaction and limiting reagent. The diagnostic exposes ratio direction and flags recorded values above the theoretical quantity. It does not balance equations, identify the limiting reagent, correct purity, dry a product, model equilibrium, estimate uncertainty, or decide why material was lost or gained.
Actual eight from theoretical ten gives 80 percent, and 4.5 from six gives 75 percent. A recorded 10.5 from theoretical ten gives 105 percent and is correctly classified above theoretical. The final row has actual six from theoretical eight, so 75 percent is expected; its inverted 133.333 percent and above claim are flagged.
Percent yield equals actual yield divided by theoretical yield times one hundred. At or below theoretical corresponds to a result no greater than 100 percent; above theoretical is a review flag. Numerical percentage and classification must both match within tolerance for the learner claim to be supported.
Supported means the learner used the correct ratio and classified the result consistently. A value above 100 percent can reveal incomplete drying, contamination, wrong product form, incorrect theoretical yield, calibration error, or unit mismatch. A value below 100 percent can reflect transfers, side reactions, equilibrium, decomposition, solubility, or incomplete reaction.
Do not invert actual and theoretical yield, use reactant mass as product yield, calculate from an unbalanced equation, ignore limiting reagent or purity, mix hydrate and anhydrous forms, treat values over 100 as automatically fabricated, or round theoretical yield too early. Preserve the calculation trail and investigate apparatus and material evidence.
Learning boundary
This browser-local workbench applies only the disclosed rules. It cannot diagnose a learner, certify an experiment, or replace teacher, laboratory, and safety judgment.
Review checklist
Practical questions
No. Processing occurs in the current browser tab. Avoid personal information and retain authoritative records only in the approved school system.
No. It describes entered evidence under one disclosed rule. Review reasoning, uncertainty, access, and several evidence sources.
Treat it as an editable calculation aid. Show your own reasoning, cite required sources, and follow course and academic-integrity rules.
YOUR NIRMION
