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Extended Debye-Hückel Ionic Activity Calculator

log γ = −A·z²·√I / (1 + B·a·√I) — activity coefficient.

Calculates the mean ionic activity coefficient γ using the extended Debye-Hückel equation from ionic strength, charge, and ion-size parameter.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

log γ± = −0.509 × z² × √I / (1 + 3.28×a×√I)

In depth

Calculates the mean ionic activity coefficient γ using the extended Debye-Hückel equation from ionic strength, charge, and ion-size parameter.