Equivalent Conductivity Calculator

Equivalent conductivity is the conductivity of a solution containing one equivalent of electrolyte placed between two electrodes 1 cm apart. Unlike specific conductivity, it accounts for the concentration of ions and increases with dilution.

Equivalent conductivity is calculated by dividing the specific conductivity by the normality of the solution. The formula is Λ = κ/N, where κ is specific conductivity and N is normality.

Equivalent conductivity at infinite dilution (Λ₀) represents the maximum conductivity an electrolyte can achieve when completely dissociated and free from inter-ionic interactions. It's used to determine the strength of electrolytes.

Equivalent conductivity is typically expressed in S·cm²/equiv or S·cm²/mol. The SI unit is S·m²/mol, but S·cm²/mol is more commonly used in practice.

Temperature significantly affects conductivity as it influences ion mobility and dissociation. Higher temperatures generally increase conductivity by about 2% per degree Celsius for most electrolytes.

Strong electrolytes show a linear relationship between equivalent conductivity and √concentration, while weak electrolytes show a much steeper increase in conductivity with dilution due to increased dissociation.

Accuracy depends on measurement precision and the validity of assumptions. For strong electrolytes at moderate concentrations, calculations are typically accurate within 1-2%. Weak electrolytes require more complex models.

For weak electrolytes, the degree of dissociation (α) equals the ratio of equivalent conductivity at a given concentration to that at infinite dilution: α = Λc/Λ₀.