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Chemistry Calculators – pH/pOH Calculator
x402
Chemistry Calculators – pH/pOH Calculator is a paid API for AI agents from chemistry-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Calculates pH, pOH, hydrogen-ion concentration, and related values for strong acids/bases, weak acids/bases, and buffers using Henderson-Hasselbalch.
Price / call$0.02
Success—
StatusUnknown
How this service works
pH and pOH for a strong or weak acid or base, a hydrogen-ion concentration, or a buffer (Henderson-Hasselbalch).
Output
Returns pH (numeric), pOH (numeric), hydrogen-ion molarity, hydroxide-ion molarity, percent ionized (for weak acids/bases), the mode used, a plain-language summary, and an optional disclaimer — all as a JSON object.
Example use cases
Buffer pH for lab protocol
“I'm preparing a phosphate buffer for a biology experiment. The pKa is 7.2, the weak-acid concentration is 0.08 M, and the conjugate-base concentration is 0.12 M. What pH will that buffer have?”
Strong acid pH for chemistry homework
“What are the pH and pOH of a 0.002 M solution of hydrochloric acid? It's a strong acid that releases one proton per molecule.”
Hydrogen-ion concentration from pH
“If a solution has a pH of 3.7, what is the hydrogen-ion molar concentration and the corresponding pOH?”
Technical details
Endpoint
GEThttps://chemistry-calc.x402tookit.com/ph-calc?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need precise, formula-based acid-base pH/pOH calculations across all common chemistry scenarios — strong acids, strong bases, weak acids, weak bases, buffers, or pH/[H⁺] interconversions — and want a single API that handles all modes. Prefer it over general-purpose LLM math for accuracy and over building your own logic for breadth of coverage.
Side effects
- Missing required 'mode' parameter returns an error
- Providing an invalid mode string returns a validation error
- Supplying concentration or Ka/Kb of zero or negative numbers may produce NaN or error responses
- Omitting Ka/Kb for weak-acid/weak-base mode causes calculation failure
- Omitting acidConc or baseConc for buffer mode causes failure
- Network or payment errors may prevent the call from completing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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