Osmotic pressure (van’t Hoff) (π = i × molarity (mol L⁻¹) × R × T: common JEE form with R = 0.0821 L atm mol⁻¹ K⁻¹ when)
jee-mainjee-advancedneet-ug
π = i × molarity (mol L⁻¹) × R × T — common JEE form with R = 0.0821 L atm mol⁻¹ K⁻¹ when π in atm
What each symbol means
| Symbol | What it stands for |
|---|---|
| C | Molar concentration (mol L⁻¹) |
| R | Gas constant — match units to π and C |
| T | Absolute temperature (K) |
| i | van’t Hoff factor |
| π | Osmotic pressure |
When to use this
Dilute ideal solution; van’t Hoff law; semipermeable membrane solvent-only passage.