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Osmotic Pressure Calculator
Calculate osmotic pressure (π) using the van 't Hoff equation
Formula: π = i × M × R × T
Where i is the van 't Hoff factor, M is molarity, R = 0.08206 L·atm/(mol·K), and T is temperature in Kelvin.
Where i is the van 't Hoff factor, M is molarity, R = 0.08206 L·atm/(mol·K), and T is temperature in Kelvin.
Solution Parameters
Calculation Results
⚠️ The van 't Hoff equation for osmotic pressure is strictly valid for dilute, ideal solutions. In concentrated solutions, interionic attractions and ion-pairing cause the effective van 't Hoff factor to be lower than the theoretical number of dissociated ions.