Equivalent Conductivity Calculator

Equivalent conductivity measures how well an electrolyte solution conducts electricity per unit of charge concentration — a key property in electrochemistry and solution analysis. Enter your solution's measured conductivity, concentration, temperature, electrolyte type, and charge product (z+×z−) into the Equivalent Conductivity Calculator to find the equivalent conductivity in S·cm²/mol. Secondary outputs include molar conductivity, conductivity at infinite dilution, and degree of dissociation.

S/cm

Specific conductivity of the solution

mol/L

Molar concentration of the electrolyte

°C

Temperature at which measurement was taken

Product of cation and anion charges

Results

Equivalent Conductivity

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Molar Conductivity

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Conductivity at Infinite Dilution

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Degree of Dissociation

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Frequently Asked Questions

What is equivalent conductivity and how is it different from specific conductivity?

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.

How do I calculate equivalent conductivity from measured data?

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.

What is the significance of equivalent conductivity at infinite dilution?

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.

What are the typical units for equivalent conductivity?

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.

How does temperature affect equivalent conductivity measurements?

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.

What is the difference between strong and weak electrolytes in conductivity?

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.

How accurate are equivalent conductivity calculations?

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.

What is the relationship between equivalent conductivity and degree of dissociation?

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.