STEM AND ASSESSMENT EVIDENCE WORKBENCH
Count each element on both sides of a symbolic equation and compare balanced-or-unbalanced learner claims with exact evidence.
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
A leading coefficient multiplies every atom count in its formula. A subscript multiplies the immediately preceding element or parenthesized group. Counts are summed by element on each side. The equation is balanced exactly when both sides contain the same elements and every corresponding count is equal. Formula subscripts remain fixed because changing them changes the substances. A supported claim agrees with the parsed conservation evidence. For a conflict, the report names elements whose counts differ so the learner can adjust coefficients and recount. Equal atom totals support conservation of each entered element but do not by themselves prove charge balance, correct formulas, lowest integer coefficients, reaction conditions, or that the equation represents a real process.
Confirm the prompt, approved source, units, symbols, notation, expected model, and review threshold. Keep an unchanged copy of observations or learner responses before editing any row.
Run the worked example, inspect intermediate rows, and compare the evidence with a hand calculation, diagram, physical model, periodic table, or moderated assessment source.
Record the method, assumptions, units, classifications, rounding, and flagged rows. Treat the downloaded report as editable evidence and verify it independently before instruction or assessment.
How to interpret the result
Use after learners decide whether supplied symbolic equations conserve each element. The parser exposes side-by-side atom totals so feedback can target coefficient distribution or group subscripts. It does not generate balancing coefficients, verify that compounds exist, evaluate charge, cancel spectator ions, check phase labels, predict products, or establish reaction feasibility.
Water and ammonia formation are balanced. The methane row supplies only one O2 but needs two, so its balanced claim is contradicted by oxygen counts. Calcium hydroxide demonstrates a parenthesized group. The iron oxidation equation is actually balanced, while the learner calls it unbalanced, producing a second deliberate claim conflict.
A leading coefficient multiplies every atom count in its formula. A subscript multiplies the immediately preceding element or parenthesized group. Counts are summed by element on each side. The equation is balanced exactly when both sides contain the same elements and every corresponding count is equal. Formula subscripts remain fixed because changing them changes the substances.
A supported claim agrees with the parsed conservation evidence. For a conflict, the report names elements whose counts differ so the learner can adjust coefficients and recount. Equal atom totals support conservation of each entered element but do not by themselves prove charge balance, correct formulas, lowest integer coefficients, reaction conditions, or that the equation represents a real process.
Do not change subscripts, apply a coefficient to only the first element, forget to distribute a group subscript, omit diatomic elemental forms, or stop after balancing one element without recounting all others. Reduce a common coefficient factor when required, preserve formulas from the source, and check charge separately for ionic equations.
Learning boundary
This browser-local workbench applies only the disclosed model to entered values. It cannot diagnose a learner, certify an experiment, establish a chemical fact, classify a task automatically, or replace teacher and laboratory judgment.
Review checklist
Practical questions
No. Processing occurs in the current browser tab. Avoid names and other personal information, and retain authoritative records only in the system approved by the school.
No. It reports how the entered evidence behaves under one disclosed rule. Ask for reasoning and compare several evidence sources before reaching an educational conclusion.
Treat it as an editable calculation aid. Show your own reasoning, cite required sources, use the course method, and follow the applicable academic-integrity rules.
YOUR NIRMION
