Public evidence

chemistry.solution.molarity

Machine-checked verification for calculation version 1.0.0 · tier engine_tested

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Verification

14/14 calculation tests · Production surface contract 3/3

Golden tests 1 / 1
Boundary tests 8 / 8
Property tests 5 / 5
Production surface contract 3 / 3
Engine tested Yes
Source checked Yes
Artifact integrity PASS
Production attestation Embedded snapshot: unpublished · Build schema 1.0.0 ready · Semantic contract ✓ · Attestation report not published on origin · Live production status PASS (0 stale; 164 CURRENT) @ 2026-09-16T06:44:24.909Z
Semantic contract PASS
Evidence attested at 2026-09-16T06:44:24.203Z
Last production check 2026-09-16T06:44:24.203Z
Public / cache —
Origin —
Supplemental domain review Not performed
Named expert review Not performed

release artifacts aligned PASS
schema valid input executes PASS
engine success output validates schema PASS

Fingerprint sha256:9094a5820952f71bc7e2c5d7d1b9484c4d53581cfc7e2334ab5ac65ee94d8208

Input schema sha256:3d506ca4830d42b1a6317f81c2286b1f0e952ecd4aa3ae94fea8d84d569c2b26 · Output schema sha256:83faeefb90afae1f3fb3f4fd1b759e5375a64c62ab88e0e119c09a365cec92df · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool: molarity
Engine: molarity
Engine build: 2026-09-16
Evidence core: 2026-09-16T11:18:24.767Z
Rendered: 2026-09-16T11:29:50.773Z
Last reviewed: —

Assumptions

c = n/V
C1·V1 = C2·V2
Lab units mol, L, mol/L
Not mole n=m/M
Not ICE or Henderson–Hasselbalch

Limitations

Lab units mol, L, mol/L
Not mole n=m/M or Avogadro
Not ICE or Henderson–Hasselbalch
Dilution needs exactly one of c1, v1, c2, v2 omitted

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

OpenStax Chemistry 2e — Molarity — Molarity
Supports: c = n/V relates amount, volume, and molar concentration
OpenStax Chemistry 2e — Dilution of Solutions — Dilution
Supports: C1·V1 = C2·V2 conserves solute amount on dilution
IUPAC Gold Book — concentration — amount concentration
Supports: Amount concentration is amount of substance divided by volume

Published checks

Golden, boundary, and property cases included in this evidence build.

ID	Kind	Status	Detail
`golden-molarity`	golden	pass	Expected molarity=2 · amount=0.5 · volume=0.25 · model=solution · Actual mode=molarity · molarity=2 · amount=0.5 · volume=0.25 · model=solution
`boundary-sol-amount`	boundary	pass	Expected amount=0.5 · Actual mode=amount · molarity=2 · amount=0.5 · volume=0.25 · model=solution
`boundary-sol-volume`	boundary	pass	Expected volume=0.25 · Actual mode=volume · molarity=2 · amount=0.5 · volume=0.25 · model=solution
`boundary-sol-dilution`	boundary	pass	Expected v2=1 · solved_field=v2 · Actual mode=dilution · c1=2 · v1=0.05 · c2=0.1 · v2=1 · solved_field=v2 · model=solution
`boundary-sol-zero`	boundary	pass	Expected molarity=0 · Actual mode=molarity · molarity=0 · amount=0 · volume=1 · model=solution
`boundary-sol-V`	boundary	pass	Expected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
`boundary-sol-missing`	boundary	pass	Expected MISSING_REQUIRED_INPUT · Actual MISSING_REQUIRED_INPUT
`boundary-sol-all-four`	boundary	pass	Expected INVALID_INPUT · Actual INVALID_INPUT
`boundary-sol-mode`	boundary	pass	Expected INVALID_MODE · Actual INVALID_MODE
`property-sol-c`	property	pass	c=2
`property-sol-n`	property	pass	n=cV
`property-sol-V`	property	pass	V=n/c
`property-sol-dil`	property	pass	C1V1=C2V2
`property-sol-model`	property	pass	solution