Strong acid/base pH API

Computes pH/pOH of a fully dissociating strong acid or base from molar concentration, accounting for acid/base valence (e.g. H2SO4 → 2 H+). Answers 'What is the pH of 0.01 M HCl?', 'pH of 0.05 M H2SO4?'.

Price$0.04per request

MethodPOST

Route/v1/chemistry/strong-acid-base-ph

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

chemistryphstrong-acidstrong-basedissociationacid-baseconcentrationvalence

API URLhttps://x402.hexl.dev/v1/chemistry/strong-acid-base-ph

Integration docs

Example request

{
  "concentration": 0.01,
  "type": "acid"
}

Example response

{
  "type": "acid",
  "concentration": 0.01,
  "valence": 1,
  "effectiveIonConcentration": 0.01,
  "pH": 2,
  "pOH": 12,
  "h": 0.01,
  "oh": 1e-12,
  "formula": "pH = -log10(valence·C)"
}

Input schema

{
  "type": "object",
  "required": [
    "concentration"
  ],
  "properties": {
    "concentration": {
      "type": "number",
      "examples": [
        0.01
      ]
    },
    "type": {
      "type": "string",
      "examples": [
        "acid",
        "base"
      ]
    },
    "valence": {
      "type": "number",
      "examples": [
        1,
        2
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}