Debye-Hückel Theory
Key concepts of the theory:
- Describes ion-ion interactions
- Based on ionic atmosphere model
- Valid for dilute solutions
- Accounts for electrostatic forces
Calculate Electrolyte Solution Properties
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Calculate ionic strength from ion concentrations and charges.
Calculate activity coefficient using the Debye-Hückel limiting law.
Calculate activity coefficient using the extended Debye-Hückel equation.
Key concepts of the theory:
Important solution property that:
Improvements over limiting law:
Theory is important for:
I = ½Σ(cᵢzᵢ²)
Where cᵢ is concentration and zᵢ is charge
log₁₀γ± = -A|z₊z₋|√I
A is the Debye-Hückel constant
log₁₀γ± = -A|z₊z₋|√I/(1 + Ba√I)
B is related to ion size parameter a