pH to Voltage Calculator

Convert pH measurements to voltage outputs using the Nernst equation for electrochemical measurements

Input Parameters

Calculation Results

Calculation Formula

E = E₀ + (RT/nF) * ln(10^(-pH))

Where:
E = Cell potential (mV)
E₀ = Reference cell potential (mV)
R = Universal gas constant (8.314 J/(mol·K))
T = Temperature (K)
n = Number of electrons transferred (typically 1 for pH measurements)
F = Faraday's constant (96485.34 C/mol)
pH = pH value

pH to Voltage Calculator Calculator Usage Guide

Learn how to use the pH to Voltage Calculator and its working principles

How to Use the Calculator

  1. Enter the pH value of your solution (typically between 0 and 14)
  2. Set the temperature of your solution in degrees Celsius
  3. Specify the reference cell potential in millivolts (typically 0 for standard measurements)
  4. Click the "Calculate" button to compute the voltage output
  5. The calculator uses the Nernst equation to convert pH to voltage

Working Principle

This calculator uses the Nernst equation to convert pH measurements to voltage outputs. The Nernst equation relates the electrical potential of an electrochemical cell to the concentration of ions in solution.

The formula used is:

E = E₀ + (RT/nF) * ln(10^(-pH))

Where:

  • E is the cell potential in volts
  • E₀ is the reference cell potential in volts
  • R is the universal gas constant (8.314 J/(mol·K))
  • T is the temperature in Kelvin
  • n is the number of electrons transferred (typically 1 for pH measurements)
  • F is Faraday's constant (96485.34 C/mol)
  • pH is the pH value of the solution

Applications

This calculator is useful in various fields including:

  • Environmental monitoring of water quality
  • Industrial process control
  • Chemical analysis
  • Academic research