What this calculator does
Ionic strength of a solution works out ionic strength from the concentration and charge of every ion present in a solution. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaI = ½ Σ cᵢzᵢ²
The inputs explained
| Field | What to enter |
|---|---|
| Concentration of each ion, mol/L (comma-separated) | A list of numbers, separated by commas or spaces. |
| Charge of each ion, same order (comma-separated) | A list of numbers, separated by commas or spaces. |