Molarity of a solution API

Computes molarity (mol/L) from solute moles, or from grams plus a formula/molar mass, and a solution volume in L or mL. Answers 'What is the molarity of 0.5 mol in 2 L?', 'What is the concentration of 5 g NaCl in 250 mL?'.

Price$0.04per request

MethodPOST

Route/v1/chemistry/molarity

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

chemistrymolarityconcentrationsolutionmol-per-litremolarstoichiometryanalytical

API URLhttps://x402.hexl.dev/v1/chemistry/molarity

Integration docs

Example request

{
  "moles": 0.5,
  "volumeL": 2
}

Example response

{
  "molarity": 0.25,
  "units": "mol/L",
  "moles": 0.5,
  "volumeL": 2,
  "formula": "M = moles / litres"
}

Input schema

{
  "type": "object",
  "properties": {
    "moles": {
      "type": "number"
    },
    "grams": {
      "type": "number"
    },
    "formula": {
      "type": "string",
      "examples": [
        "NaCl"
      ]
    },
    "molarMass": {
      "type": "number"
    },
    "volumeL": {
      "type": "number",
      "examples": [
        2
      ]
    },
    "volumeMl": {
      "type": "number"
    }
  }
}

Output schema

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