Osmotic Pressure Calculator
Calculate osmotic pressure using van't Hoff equation. Analyze colligative properties.

Number of particles per formula unit

mol/L

Osmotic Pressure
4.8932
Pressure (atm)
495.81
Pressure (kPa)
3718.9
Pressure (mmHg)
4.958e+5
Pressure (Pa)

van't Hoff Factor

2

Molarity

0.1 M

Temperature

298.15 K (25 C)

Osmosis Visualization
van't Hoff Factor Reference
Non-electrolytes (i = 1):

Glucose, Sucrose, Urea

Binary electrolytes (i = 2):

NaCl, KCl, HCl

Ternary electrolytes (i = 3):

CaCl2, Na2SO4, MgCl2

Quaternary electrolytes (i = 4):

AlCl3, FeCl3

van't Hoff Equation

pi = iMRT
R = 0.08206 L·atm/(mol·K)

Where:

  • pi = osmotic pressure
  • i = van't Hoff factor (ionization factor)
  • M = molarity (mol/L)
  • R = gas constant
  • T = temperature (K)

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