Potentiometric Titration Calculator

Calculate Electrode Potentials and Equivalence Points

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Nernst Equation Calculator

Calculate electrode potential using the Nernst equation.

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Equivalence Point Calculator

Find equivalence point using potential data.

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Gran Plot Calculator

Generate Gran plot for precise endpoint determination.

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Understanding Potentiometric Titration

What is Potentiometric Titration?

Key concepts include:

  • Measures potential difference
  • Uses indicator electrode
  • Reference electrode
  • Concentration-dependent potential
  • High precision endpoint detection

Types of Electrodes

Common electrodes used:

  • Glass Electrode: pH measurements
  • Metal Electrodes: Redox titrations
  • Ion-Selective: Specific ion detection
  • Reference: Ag/AgCl, calomel

Advantages and Applications

Benefits include:

  • High precision
  • No indicators needed
  • Automated analysis
  • Works with colored solutions
  • Multiple endpoints detection

Method Requirements

For accurate results:

  • Stable electrode response
  • Proper temperature control
  • Regular calibration
  • Clean electrode surface
  • Constant ionic strength

Essential Potentiometric Formulas

Nernst Equation

E = E° - (RT/nF)ln(Q)

At 25°C:

E = E° - (0.0592/n)log[Red]/[Ox]

Gran Plot

V₀×10^(E/k) vs V

Where:

V₀ = Initial volume

k = Nernst slope

Endpoint Detection

ΔE/ΔV maximum

or

Δ²E/ΔV² = 0