This osmotic pressure calculator is a tool that helps you calculate the pressure required to completely stop the osmosis process. In this article, we will provide you with all knowledge required to understand how it works: from the osmotic pressure equation to a complete example of calculations. You will also learn what is osmotic pressure by definition. If you were ever wondering how to calculate the osmotic pressure, you've come to the right place!
Osmosis is the process in which a liquid passes through a semi-permeable membrane. The pores of the membrane allow solvent molecules to pass through, but are too small for the larger solute molecules - the membrane is impermeable for them.
Osmotic pressure is defined as the minimum pressure that needs to be applied to a solution to prevent its flow through the semi-permeable membrane - in other words, to completely stop osmosis. Applying such a pressure allows the solution to achieve osmotic equilibrium. It finds application in many industrial and chemical processes, such as water purification, water desalination, and waste material treatment.
If you want to calculate the osmotic pressure, you need to use the osmotic pressure formula in the form:
π = n * Φ * c * R * T
where:
8.314 J/(K*mol)
. It is also used in our ideal gas law calculator.If you want to find osmotic pressure, simply follow the steps below.
c = m / (M * V) = 1 / (142 * 0.1) = 0.07 mol/L
.
The table below lists the most common substances along with the number of ions obtained by dissociation n, molecular weight M and osmotic coefficient Φ.
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