chemistry.equilibrium.weak_base

Three distinct suites: educational examples on the calculator page, this legacy regression count (13/13 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

This calculator CURRENT · Public schema 1.0.4 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Verification revision 2026-10-13.node22-residual-replay. Calculation version 1.0.4. CVP 1.0.0-proposed. 3/3 golden · 5/5 CVP boundary · 7/7 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 2/2 cross-interface · 6/6 CVP contract. digest 87cd5351751e. O2: monoprotic weak-base ICE vs a separate-module quadratic or Newton cubic. Agreement is absolute 1e-8 because the IUT root is a residual solver. Not a buffer. Absolute 1e-8 vs O3 applies only to the published tabulated weak-base vectors. Not a buffer.

• Golden (oracle-backed) 3 / 3
• CVP boundary 5 / 5
• Invalid input 7 / 7
• Property 1 / 1
• Metamorphic 1 / 1
• O3 high-precision 8 / 8
• Cross-interface 2 / 2
• CVP contract 6 / 6
• Interfaces PASS · UI (SSR) / REST / MCP
• Interface claim ui-ssr is query-result HTML, not a live browser session. Error-path engine·REST·MCP 1/1 (status, code, calculation_version). SSR compared on URL-canonical requested calculations; empty query is idle (not an error) and JSON-typed object/array inputs are REST/MCP-only.
• Verified scope Monoprotic weak-base ICE, + O3 mpmath tabulated [OH−].
• Assurance Engineering
• Deferred Not a buffer and not a weak acid.

• release artifacts aligned PASS
• schema output required declared PASS
• schema valid input executes PASS
• engine success output validates schema PASS
• schema rejects incomplete input PASS
• rest success payload validates schema PASS

Fingerprint sha256:21e8be4f46fa7469f7765fbf94caaac54c799599bb8adf54611b1dcf19664965

Input schema sha256:52e11e8bd863347b4b3b8cb1726170da0f7c815e7664d7b4777668e56b6fa1cd · Output schema sha256:8d9e7e9e689b9e7c5666e0c5e86cf313393df800dacc174b84c7aa9c090c9ef1 · 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

2026-10-13

Evidence core

2026-10-13T01:25:20.192Z

Rendered

2026-10-23T01:27:11.354Z

Last reviewed

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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