chemistry.equilibrium.weak_base

• Golden tests 2 / 2
• Boundary tests 6 / 6
• Property tests 5 / 5
• Production surface contract 4 / 4
}
• Engine tested Yes
• Source checked Yes
• Artifact integrity PASS
• Production attestation Embedded snapshot: STALE · Last attested schema matched 1.0.0 snapshot / local build · Semantic contract ✓ · Last attestation PASS · current evidence changed · re-attestation required · Public/cache ✓ · Origin ✓ · Live production status PASS (0 stale; 163 CURRENT) @ 2026-09-17T06:27:56.932Z
• Semantic contract PASS
• Evidence attested at 2026-09-17T06:27:56.176Z
• Last production check 2026-09-17T06:27:56.176Z
• Public / cache PASS
• Origin PASS
• 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
• schema rejects incomplete input PASS

Fingerprint sha256:957fd0340cb47dca39c17dae47aada06476ad8c08abba17ce9852e7ea0977420

Input schema sha256:073f39f84d9cd562e664208103e22a8a62652562fac96c14dfe441e16db36913 · Output schema sha256:9f760ee4fdac66ddabe7e16ab26496521c474716b27af9eec45e8f8d79d47f04 · 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.

Tool

weak-base-equilibrium

Engine

weak-base-equilibrium

Engine build

2026-09-17

Evidence core

2026-09-17T03:27:38.061Z

Rendered

2026-09-17T06:35:12.150Z

Last reviewed

—

Assumptions

• Monoprotic B + H2O ⇌ BH+ + OH−
• Activity coefficients ≈ 1
• Kw = 1e-14 at 25 °C when mode=ice
• Not Henderson–Hasselbalch
• Not weak-acid ICE
• Not pH = −log10[H+] identities
• Not polyprotic, not titration

Limitations

• Monoprotic B only; not polyprotic, not a weak acid, not activity coefficients
• Not Henderson–Hasselbalch (buffer pair as given)
• Not weak-acid ICE HA ⇌ H+ + A−
• Not the water-ion identity page pH=−log10[H+]
• Kw = 1e-14 at 25 °C when mode=ice