Diffusion and Osmosis Lab 10/8/12

For these 3 pictures you can see that the crystals (potassium permanganate powder form) dissolves differently and at different rates depending on the temperature. In the first pic you can see that its ice water, room temperature and a tube from the hot water bath. the powder reacts differently to the temperatures.


This was a lab on diffusion- these are pictures of 2 different dyes , the blue is methylene blue (on the left) and the red is potassium permanganate (on the right) the top picture is when we had just put the dyes in there. The second pic is 8 minutes later. you cans see that the bigger molecules doesn't diffuse as fast.

 This was the lab part that was on osmosis. In the top picture we have slices of potato in the test tube. one test tube has distilled water in it and the other has salt water. once we let it sit for 20 mintues the distilled waters slice of potato felt hard and stiff which was a hypotonic reaction and the salt water slice felt flimsy and moveable, which was hypertonic.

The bottom pic is of celery, one test tube was salt water and the other was distilled. it had the same results the salt water was flimsy and moveable, which was hypertonic and the distilled was hard, hypotonic.