Osmolarity Calculator
Calculate the osmolarity of a solution based on solute concentration and particle dissociation.
Calculation Parameters
Adjust the values below.
Calculated Result
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 Osmolarity problems dynamically. Adjust the input parameters using the sliders or selection menu below:
- Molarity (M, mol/L) (Range: 0.01 to 2.00, Default: 0.15)
- Dissociation Particles (n) (Range: 1 to 5, Default: 2)
- Osmotic Coefficient (Φ) (Range: 0.50 to 1.00, Default: 0.93)
The results are computed instantly and updated in the results panel on the right.
Formula & Methodology
Where:
- Molarity: Parameter value.
- Dissociation Particles: Parameter value.
- Osmotic Coefficient: Parameter value.
Step-by-Step Calculation Example
To calculate Osmolarity manually, follow these steps:
- Identify the input parameters. For example:
- Molarity (M, mol/L) = 0.15
- Dissociation Particles (n) = 2
- Osmotic Coefficient (Φ) = 0.93
- Apply the formula:
Osmolarity (Osm/L) = Molarity (M) * Dissociation particles (n) * Osmotic coefficient (Φ)
- Verify the calculated value which is updated instantly in the results panel on the right.
Frequently Asked Questions
What is osmolarity? ▼
Osmolarity is the concentration of osmotically active particles per liter of solution (Osm/L or mOsm/L).
What is the formula for osmolarity? ▼
Osmolarity = Molarity (M) × Number of dissociated particles per formula unit (n).
What is human blood plasma normal osmolarity? ▼
Normal human blood plasma osmolarity is approximately 280 to 295 mOsm/L.