1. What is Fugacity of Electrolyte?

Definition: Fugacity is a thermodynamic property of a real gas which if substituted for the pressure or partial pressure in the equations for an ideal gas gives equations applicable to the real gas.

Purpose: This calculator helps determine the fugacity of an electrolyte based on its ionic activity and actual concentration.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( f \) — Fugacity (Pascal)
• \( a \) — Ionic activity (mol/kg)
• \( c \) — Actual concentration (mol/L)

Explanation: The square root of ionic activity is divided by the actual concentration to calculate the fugacity.

3. Importance of Fugacity Calculation

Details: Fugacity is crucial for understanding the thermodynamic behavior of real gases and solutions, particularly in chemical engineering and physical chemistry applications.

4. Using the Calculator

Tips: Enter the ionic activity in mol/kg and actual concentration in mol/L. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is ionic activity?
A: Ionic activity is the measure of the effective concentration of a molecule or ionic species, accounting for interactions between ions in solution.

Q2: Why do we take the square root of activity?
A: The square root accounts for the symmetric nature of the electrolyte's dissociation in solution.

Q3: What units should I use?
A: Use mol/kg for ionic activity and mol/L for concentration to get fugacity in Pascals.

Q4: How accurate is this calculation?
A: This provides a good estimate for dilute solutions. For more concentrated solutions, additional correction factors may be needed.

Q5: Can I use this for non-electrolytes?
A: No, this formula is specific for electrolytes. Different approaches are needed for non-electrolytes.