🔍 What is this calculator used for?

This Ionic Strength Calculator helps you determine the ionic strength of a solution, which is essential in chemical reactions, buffer preparation, and understanding activity coefficients in ionic solutions.

⚙️ How to use this calculator

• Enter the concentration of the ion in mol/L.
• Enter the charge of the ion (e.g., +1, +2, -1).
• The calculator will automatically compute the ionic strength.

🧪 Formula

Ionic Strength (I) is calculated using the formula:

I = 0.5 × Σ ci × zi²

Where:
- ci is the molar concentration of ion i
- zi is the charge of ion i

📘 Example

If you have a 0.1 mol/L NaCl solution:

• Na⁺: c = 0.1 mol/L, z = +1 → 0.1 × 1² = 0.1
• Cl⁻: c = 0.1 mol/L, z = -1 → 0.1 × 1² = 0.1

I = 0.5 × (0.1 + 0.1) = 0.1 mol/L

🔗 Reference

Based on Omni Calculator - Ionic Strength