Diffusion Lab - Lab 4 Diffusion Osmosis and Hemolysis , . ,

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Lab 4 – Diffusion, Osmosis, and Hemolysis In this lab we learned about diffusion, a process by which molecules move about randomly and  evenly down a concentration gradient. Diffusion is affected by concentration and temperature.  We also learned about osmosis, which is the movement of water and small molecules across a  selectively permeable membrane. Lastly, we learned about hemolysis and what happens when red blood cells are placed in a hypertonic and hypotonic salt solution. We performed these 3  experiments: Experiment 1 -  - We took 3 test tubes, added water and place drops of iodine at the bottom - One we place in an ice bucket, one left at room temp, and one in hot water - We saw that the hotter the temperature the faster the molecules spread though the water  (that is why the hot water was yellowish before the room temp, and the iced water was  just barely yellow at the very bottom). 
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