Mean Ionic Activity Formula:
From: | To: |
Definition: The mean ionic activity is the effective concentration of ions in a solution of bi-trivalent electrolyte, accounting for ionic interactions.
Purpose: It helps chemists and researchers understand the non-ideal behavior of electrolyte solutions where cation and anion have different charges.
The calculator uses the formula:
Where:
Explanation: The formula accounts for the stoichiometry of bi-trivalent electrolytes where cations have +2 charge and anions have -3 charge.
Details: Accurate calculation of mean ionic activity is crucial for understanding solution thermodynamics, predicting chemical equilibria, and designing electrochemical systems.
Tips: Enter the mean activity coefficient (typically between 0 and 1) and molality of the solution (in mol/kg). The calculator will compute the mean ionic activity.
Q1: What is a bi-trivalent electrolyte?
A: An electrolyte where cations have +2 charge and anions have -3 charge (e.g., Ca₃(PO₄)₂).
Q2: Why is 108 used in the formula?
A: 108 comes from (ν₊^ν₊ × ν₋^ν₋)^(1/ν) where ν₊=3, ν₋=2, ν=5 for a 2:3 electrolyte.
Q3: How do I determine the mean activity coefficient?
A: It can be calculated using Debye-Hückel theory or measured experimentally.
Q4: What's the range for mean activity coefficient?
A: Typically between 0 (strong interactions) and 1 (ideal behavior).
Q5: Can this calculator be used for other electrolyte types?
A: No, this specific formula is only for 2:3 electrolytes. Different stoichiometries require different formulas.