Osmotic Pressure Formula:
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Definition: This calculator determines the osmotic pressure of a solution containing two different solutes based on their concentrations and temperature.
Purpose: It helps in understanding the pressure required to prevent solvent flow across a semipermeable membrane in solutions with multiple solutes.
The calculator uses the formula:
Where:
Explanation: The sum of solute concentrations is multiplied by the gas constant and absolute temperature to calculate osmotic pressure.
Details: Osmotic pressure calculations are crucial in biological systems, water purification, and industrial processes involving semipermeable membranes.
Tips: Enter concentrations of both particles in mol/L and temperature in Kelvin. The default temperature is 298K (25°C).
Q1: What units should I use for concentration?
A: The calculator uses mol/L (molarity) for concentration inputs. Convert other units to molarity before entering.
Q2: Why is temperature in Kelvin?
A: The gas constant uses Kelvin in its units, and absolute temperature is required for thermodynamic calculations.
Q3: Does this work for more than two solutes?
A: Yes, you can sum the concentrations of all solutes in the solution (C1 + C2 + C3 + ...).
Q4: What's the significance of the gas constant?
A: The universal gas constant relates energy to temperature on a per-mole basis in the ideal gas law and osmotic pressure equations.
Q5: How accurate is this calculation?
A: This gives ideal osmotic pressure. Real solutions may deviate slightly due to intermolecular interactions.