Activity Coefficient Calculator

Means ideal behavior (very dilute).

Estimate an ion's activity coefficient (Debye-Hückel).

Activity coefficient (γ) 0.8892

Formula: log γ = −0.51 · z² · √I

Step-by-step with your numbers:

1. Values used:

2. Ionic strength = 0.01 mol/L

3. Ion charge = 1

5. Activity coefficient (γ) = 0.8892

Did we solve your problem today?

The Debye-Hückel limiting law estimates how non-ideal a dilute ionic solution is.

The math behind it

log γ = −0.51 × charge² × √(ionic strength), valid for dilute solutions (I < ~0.01 M).

z 1, I 0.01 → γ ≈ 0.89.

γ = 1?

Means ideal behavior (very dilute).