Source: https://guthlabs.ai/docs/instruments/faraday-s-law-electrolysis-calculator/implementation/

instrument implementation / implementation-contract

# Faraday's Law Electrolysis Calculator implementation

A source-bound implementation contract for Faraday's Law Electrolysis Calculator; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t4-276

**Effect**: Computation or source lookup only

## Input and validation requirements

The valid-looking input z=0 causes an undefined mass calculation through division by zero; the calculator must reject it explicitly.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "current_A": 2,
    "time_s": 3600,
    "molar_mass_g_per_mol": 63.546,
    "z": 2
  },
  "expected_outputs": {
    "moles_electron": 0.074623004,
    "mass_g": 2.370997
  },
  "working": "Q=It=(2.0 A)(3600 s)=7200 C. n_e=Q/F=7200/96485=0.074623004 mol e−. mass=n_e×M/z=0.074623004×63.546/2=2.370997 g."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/faraday-s-law-electrolysis-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/faraday-s-law-electrolysis-calculator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/faraday-s-law-electrolysis-calculator/qualification/>)

## Sources and evidence

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

- `VERIFIED_LEDGER.json`

- `evidence-tranche4/tranche4-results.json`