Dilution Calculator (C1V1=C2V2) implementation

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

t3-003

Effect

Computation or source lookup only

Input and validation requirements

A zero stock concentration creates a division-by-zero and impossible mass-balance case that must be rejected; unitless volume entry also exposes a 1000-fold convention hazard.

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": {
    "mode": "single",
    "stock_concentration": "10 mol/L",
    "target_concentration": "0.5 mol/L",
    "target_volume": "1 L"
  },
  "expected_outputs": {
    "stock_volume": "0.05 L",
    "diluent_volume": "0.95 L"
  },
  "working": "V1=(C2×V2)/C1=(0.5 mol/L×1 L)/(10 mol/L)=0.05 L. Diluent=V2−V1=1 L−0.05 L=0.95 L."
}

Other records

Sources and evidence

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

• VERIFIED_LEDGER.json
• evidence-tranche3/tranche3-results.json