Osmotic Pressure

📊 intermediate

$$\pi = iCRT$$

The pressure required to stop the flow of solvent through a semipermeable membrane.

Variables & Units

$\pi$

Osmotic Pressure

Unit: $atm$ or $Pa$

$i$

van 't Hoff factor

Unit: Dimensionless

$C$

Molarity

Unit: $mol/L$

Key Information

📐 Derived From

Analogy with Ideal Gas Law applied to solutions.

💡 Example

Calculating pressure in blood cells to prevent hemolysis.

🔧 Applications

Reverse osmosis desalination and biological cell study.

⚠️ Constraints

Dilute solutions.

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