Osmotic Pressure Calculator Formula
Understand the math behind the osmotic pressure calculator. Each variable explained with a worked example.
Formulas Used
Osmotic Pressure
osmotic_pressure = vant_hoff * molarity * 0.08206 * (temp_celsius + 273.15)Osmotic Pressure
osmotic_kpa = vant_hoff * molarity * 0.08206 * (temp_celsius + 273.15) * 101.325Variables
| Variable | Description | Default |
|---|---|---|
vant_hoff | Van't Hoff Factor (i) | 1 |
molarity | Molarity(M) | 0.1 |
temp_celsius | Temperature(C) | 25 |
How It Works
How to Calculate Osmotic Pressure
Formula
pi = i × M × R × T
Where R = 0.08206 L-atm/mol-K and T is in Kelvin.
Worked Example
0.1 M glucose at 25C (i=1).
vant_hoff = 1molarity = 0.1temp_celsius = 25
- 01T = 25 + 273.15 = 298.15 K
- 02pi = 1 × 0.1 × 0.08206 × 298.15
- 03pi = 2.447 atm
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