Osmotic Pressure Calculator
Calculate osmotic pressure using van't Hoff equation for colligative properties
Calculate Osmotic Pressure
Molarity of the solution (mol/L)
Solution temperature
Number of particles per formula unit
Deviation from ideal behavior
Osmotic Pressure Results
van't Hoff Equation: π = n × Φ × c × R × T
Calculation: 1 × 1 × 1.000 × 8.314 × 298.1 = 2479 Pa
Analysis: Common in dilute biological solutions
Applications: Cell biology, plant physiology
Example Calculations
Physiological Saline
0.9% NaCl solution at body temperature
Application: Medical IV fluids
Seawater
Approximate seawater salinity
Application: Desalination studies
Plant Cell Turgor
Plant cell osmotic pressure
Application: Plant physiology
Blood Plasma
Human blood plasma osmolarity
Application: Medical diagnostics
Pressure Magnitude Guide
< 0.01 atm
Very low pressure
Dilute solutions
0.01 - 0.1 atm
Low pressure
Biological solutions
0.1 - 1 atm
Moderate pressure
Water treatment
1 - 10 atm
High pressure
Industrial processes
> 10 atm
Extreme pressure
Specialized applications
Common Dissociation Factors
Applications
Understanding Osmotic Pressure
What is Osmotic Pressure?
Osmotic pressure is the minimum pressure that must be applied to a solution to prevent the inward flow of water across a semipermeable membrane. It's one of the colligative properties that depend on the concentration of dissolved particles rather than their identity.
Key Concepts
- •Osmosis: Water movement across membranes
- •Semipermeable Membrane: Allows solvent but not solute passage
- •Colligative Property: Depends on particle concentration
- •Isotonic Solution: Equal osmotic pressure across membrane
van't Hoff Equation
π = n × Φ × c × R × T
- π: Osmotic pressure (Pa)
- n: van't Hoff factor (dissociation factor)
- Φ: Osmotic coefficient
- c: Molar concentration (mol/L)
- R: Gas constant (8.314 J/mol·K)
- T: Absolute temperature (K)
Note: For ideal solutions, Φ = 1. Real solutions may deviate from ideality.
Applications and Importance
Medical Applications
Determining proper concentrations for IV fluids, dialysis solutions, and understanding blood pressure regulation.
Water Treatment
Designing reverse osmosis systems for desalination and water purification processes.
Plant Biology
Understanding turgor pressure in plant cells and water transport in vascular systems.