Bahan ajar Tekanan Osmotik

THE OSMOTIC PRESSURE

Dialysis

isotonic solution: infusion

What is Osmotic Pressure??

The volume difference betweenthe two solution at the equilibrium generates a pressure called the osmotic pressure.

The pressure of osmotic is defined as a pressure given to prevent osmosis, which is to prevent the flow of solvent molecules.

The Calculation of the Osmotic Pressure

According to Van’t Hoff, the osmotic pressure of solution can be calculated

by using ideal gas equation:

ExampleWhat is the osmotic pressure of a solution at temperature of 27oC, if 3,6 gram of glucose (Mr = 180 gram/mole) is dissolved in water until the volume reaches 200 mL? (the pressure in atm)

Solution:200 mL= 0,2 L and 27oC= 27+273 K= 300 K

DialysisIn dialysis events called osmosis. where there is transfer of small molecules such as urea through

a semipermeable membrane and into another liquid, and then

discarded.

the difference between the concentration of the solution contained in the blood with a solution that is in the dialysis apparatus causing osmosis events

why did happen osmosis?????

Intravenous fluids should be isotonic with intracellular fluid to prevent

osmosis, either into or out of cells. Thus, blood cells are not

damaged.