Van’t Hoff Factor Calculator
Posted by Dinesh onOnline calculator to calculate the van’t Hoff factor for solution particles at measured temperature. The theoretical freezing-point depression is usually an overestimate because the ions can form pairs. To be quantitative we introduce the van’t hoff factor i:
i = (actual number of particles in solution after dissociation) ÷ (number of formula units initially dissolved in solution)
Calculated and Measured van’t Hoff factors of 0.0500 M Electrolyte solutions at 25°C
| Electrolyte | i (Calculated) | i Measured |
|---|---|---|
| Sucrose* | 1 | 1.0 |
| HCL | 2 | 1.9 |
| NaCL | 2 | 1.9 |
| MgSO4 | 2 | 1.3 |
| MgCL2 | 3 | 2.7 |
| FeCL3 | 4 | 3.4 |
Van’t Hoff Factor (i) Calculation
Formula:
i = (actual number of particles in solution after dissociation) ÷ (number of formula units initially dissolved in solution)