1.3 Osmosi

Introduction:
Osmosi is the spontaneous movement of solved molecules through a semipermeable membrane into a region of higher solute concentration (hypertonic), in the direction that tends to equalize the solute concentrations on the two sides. Water molecules travel through the plasma membrane in order to equilibrate the intra and extra cellular concentration.

Material:
-potato
-salt
-distilled water
-spatula
-3 clock glass
-pen
-knife

Objectives:
-Know about the osmosi phenomena.
-Understand the processof osmosi in plasmatic membranes.

Procedure:
Potato
-Cut the potato in three pieces and put one piece in a watch glass, the other piece in another watch glass and the last one in another watch glass.
-We take the spatula and make a small hole in the middleof the potato. In this hole we put salt and another hole, put distilled water.




Observations:
In the potato with the salt, it can be sean more water than the beginning.
And the potato with the distillited water it can be sean the potato absorbs the water and now it's more hard and dry.