1. What is Molarity of Uni-Bivalent Electrolyte given Ionic Strength?

Definition: This calculator determines the molality of a uni-bivalent electrolyte solution based on its ionic strength.

Purpose: It helps chemists and researchers calculate the molality of electrolyte solutions when the ionic strength is known.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( m \) — Molality of the solution (mol/kg)
• \( I \) — Ionic strength of the solution (mol/kg)

Explanation: For uni-bivalent electrolytes (like CaCl₂), the molality is approximately one-third of the ionic strength.

3. Importance of Molality Calculation

Details: Molality is crucial for understanding solution properties, colligative properties, and reaction kinetics in electrolyte solutions.

4. Using the Calculator

Tips: Enter the ionic strength in mol/kg. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a uni-bivalent electrolyte?
A: A uni-bivalent electrolyte is a compound that dissociates into one cation with +2 charge and two anions with -1 charge (e.g., CaCl₂).

Q2: Why divide by 3?
A: The factor 3 comes from the formula for ionic strength of uni-bivalent electrolytes: I = ½(2²m + 2×1²m) = 3m.

Q3: Can I use this for other electrolyte types?
A: No, this formula is specific to uni-bivalent electrolytes. Different factors apply to other electrolyte types.

Q4: What's the difference between molarity and molality?
A: Molarity is moles per liter of solution, while molality is moles per kilogram of solvent (temperature-independent).

Q5: How do I measure ionic strength?
A: Ionic strength can be calculated from the concentrations and charges of all ions in solution: I = ½Σcᵢzᵢ².