Math & Numbers
pH & Buffer Calculator
Calculate buffer solution pH with the Henderson-Hasselbalch equation, or find the acid/base ratio needed for a target pH.
json· JSON resultOpen tool
Quick start
Call this tool from your code in three languages.
cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/ph-buffer-calculator' \
-H 'Content-Type: application/json' \
-d '{"mode":"find-ph","bufferSystem":"phosphate","pKa":7.21,"acidConc":0.1,"baseConc":0.1,"targetPh":7.4,"totalConc":0.1,"temperature":25,"decimalPlaces":3}'API reference
Send a POST request with your inputs as JSON. File parameters require a separate upload first.
Endpoint
HTTP
POST https://api.elysiatools.com/en/api/tools/ph-buffer-calculatorParameters
| Name | Type | Required | Description |
|---|---|---|---|
| mode | select | No | — |
| bufferSystem | select | No | — |
| pKa | number | No | Required for Custom buffer; auto-filled for presets (you can still override). |
| acidConc | number | No | Concentration of the weak acid (protonated) form. |
| baseConc | number | No | Concentration of the conjugate base (deprotonated) form. |
MCP integration
Add this tool to your Model Context Protocol server so AI agents can list and call it.
Server configuration
Add this block to your MCP client configuration:
mcp.json
{
"mcpServers": {
"elysiatools-ph-buffer-calculator": {
"name": "ph-buffer-calculator",
"description": "Calculate buffer solution pH with the Henderson-Hasselbalch equation, or find the acid/base ratio needed for a target pH.",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=ph-buffer-calculator",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}List available tools
After connecting to the SSE endpoint, list the exposed tools:
tools/list
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Call this tool
Invoke the tool by its id, passing arguments built from its parameters:
tools/call
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "ph-buffer-calculator",
"arguments": {
"mode": "find-ph",
"bufferSystem": "phosphate",
"pKa": 7.21,
"acidConc": 0.1,
"baseConc": 0.1,
"targetPh": 7.4,
"totalConc": 0.1,
"temperature": 25,
"decimalPlaces": 3
}
}
}Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).
Questions or issues? Contact [email protected]