Source: https://guthlabs.ai/docs/instruments/percent-yield-calculator/

instrument / verified-clean

# Percent Yield Calculator

The current ledger marks this instrument verified clean within the source-bound verification corpus.

Status: **VERIFIED_CLEAN**Lifecycle: **verified-clean**

## Inspectable records

[01**Overview**Purpose and lifecycle](<https://guthlabs.ai/docs/instruments/percent-yield-calculator/>)[02**Mechanism**Method and assumptions](<https://guthlabs.ai/docs/instruments/percent-yield-calculator/mechanism/>)[03**Implementation**Binding and validation](<https://guthlabs.ai/docs/instruments/percent-yield-calculator/implementation/>)[04**Qualification**Evidence and errata](<https://guthlabs.ai/docs/instruments/percent-yield-calculator/qualification/>)

## Ledger state

The current ledger marks this instrument verified clean within the source-bound verification corpus.

**Area**: Chemistry & Materials

**Tranche**: tranche-2

**Evidence ID**: t2-015

**Ledger rows**: 1

No ledger note is attached.

## Review findings

The arithmetic engine is appropriate, but the catalog specification needs explicit validation rules for a positive, nonzero theoretical yield, nonnegative actual yield, matching product and stoichiometric basis, and unit compatibility. Values above 100% should be displayed honestly rather than clipped.

### Formula and scope findings

- The formula %yield=(actual/theoretical)×100 is the standard formula. The specification does not explicitly constrain actual and theoretical yields to represent the same substance on the same basis and in compatible units.

- The specification does not state that theoretical yield must be nonzero.

### Unit assumptions

- Actual and theoretical yields must use the same unit before calculation, such as grams with grams or moles with moles.

- Actual and theoretical yields must refer to the same product and equivalent stoichiometric basis.

- The output is a dimensionless percentage.

## Boundary hardening

**BREAK_CLAIMED** · SELF_FLAGGED

A theoretical yield of exactly zero causes division by zero and must be rejected. Negative yields also expose an unstated sign-validity convention.

## Errata and corrections

No applied erratum is attached to this unique-name record.

## Inspectable example

4 review vectors are recorded. One source-bound sample is shown below.

````
{
  "inputs": {
    "actual_yield": 8.5,
    "theoretical_yield": 10,
    "unit": "g"
  },
  "expected_outputs": {
    "percent_yield": 85
  },
  "working": "%yield=(actual/theoretical)×100=(8.5 g/10.0 g)×100=0.85×100=85.0%"
}
````

## Related workflows

No source-defined multi-instrument workflow membership is recorded.

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json · VERIFIED_CLEAN`

- `evidence-tranche2/tranche2-results.json`

- `BOUNDARY_HAZARD_CATALOG.json`