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Vapor Pressure Lowering Calculator
Find the vapour pressure of a solution using Raoult law and the amount of dissolved solute.
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Vapour pressure
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Find the vapour pressure of a solution using Raoult law and the amount of dissolved solute.
Vapor Pressure Lowering Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: P = x(solvent) x P0 where x = n(solvent) / (n(solvent) + i x n(solute)).
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Vapor Quick Guide
Typical values for reference.
| Solute mol | Solvent mol | i | P kPa |
|---|---|---|---|
| 0.1 | 5 | 1 | 3.108 kPa |
| 0.5 | 5 | 1 | 2.882 kPa |
| 1 | 5 | 1 | 2.642 kPa |
| 2 | 5 | 1 | 2.264 kPa |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Vapor Pressure Lowering Calculator FAQ
Answers to common questions about this calculator.
Adding a non-volatile solute reduces the vapour pressure of the solvent.
Raoult law.
The number of particles a solute produces in solution.
It assumes an ideal solution.