Osmotic Pressure Calculator
Calculate the osmotic pressure of a solution using solute concentration, temperature, and van 't Hoff factor.
Calculation Parameters
Adjust the values below.
Calculated Result
Osmotic Pressure (Π)
Expert Tip
Ensure units are correctly formatted (e.g. Kelvin for gas temperatures and liters for volumes) to get chemically accurate outputs.
How this Calculator Works
This calculator allows you to solve Osmotic Pressure problems dynamically. Adjust the input parameters using the sliders or selection menu below:
- van 't Hoff Factor (i) (Range: 1 to 4, Default: 2)
- Molar Concentration (M, mol/L) (Range: 0.01 to 5.00, Default: 0.15)
- Temperature (T, °C) (Range: 0 to 100, Default: 37)
The results are computed instantly and updated in the results panel on the right.
Formula & Methodology
where R = 0.08206 L*atm/(mol*K), T is in Kelvin
Where:
- van 't Hoff Factor: Parameter value.
- Molar Concentration: Parameter value.
- Temperature: Parameter value.
Step-by-Step Calculation Example
To calculate Osmotic Pressure manually, follow these steps:
- Identify the input parameters. For example:
- van 't Hoff Factor (i) = 2
- Molar Concentration (M, mol/L) = 0.15
- Temperature (T, °C) = 37
- Apply the formula:
Π = i * M * R * T
where R = 0.08206 L*atm/(mol*K), T is in Kelvin - Verify the calculated value which is updated instantly in the results panel on the right.
Frequently Asked Questions
What is osmotic pressure (Π)? ▼
Osmotic pressure is the minimum hydrostatic pressure required to prevent inward water flow across a semipermeable membrane.
What is the van 't Hoff osmotic pressure formula? ▼
Π = i × M × R × T, where i is van 't Hoff factor, M is molarity, R is gas constant, and T is absolute temperature.
What happens in reverse osmosis? ▼
Applying external pressure exceeding osmotic pressure (P > Π) forces water molecules across the membrane against the concentration gradient.