Osmosis

Introduction: 
Osmosis is the spontaneous movement of solvent 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. 

Objectives: 
- Know about the osmosis phenomena. 
- Understand the process of osmosis in plasmatic membranes.

Procedure: (Potato)
- Take the potato and cut it in three picies and put it every picie in a watch glass. 
- Take the spatula and make an small hole in the middle of each picie of potato. 

 1- Control of the experiment 
 2- Salt treatment (put salt inside the hole) and leave it. 
 3- Put distilled water treatment (leave it 20 min) 

Observations: 
In the first pass (control of the experiment) the potato is dry. 
In the second pass (salt treatment) the potato is with more water. 
In the third pass (distilled water) the potato absorbs the water. 


--> In the salt treatment we have the hypertonic medium 
--> In the distilled water we have the hypotonic medium