Diffusion And Osmosis Lab Report
Michelle Yeung Bio 101
Cyrus MacFoy
June 16,2015
Diffusion and Osmosis
Exercise I.
Molecules are always in constant movement. Molecular motion is a form of energy, the kinetic energy of molecules. The Brownian movement is the movement of small particles caused by the bombardment of the particles by millions of water molecule. This movement will continue indefinitely as long as there is water. My prediction for this lab is the solution of the water is hypertonic meaning there is a higher concentration of solutes outside of the cell. To test my prediction my lab partners conducted the Brownian movement.
Materials:
Bon Ami scouring powder, carmine red and Indian ink
Microscope slides and cover slip
Dropper bottles with distilled water
Spatulas …show more content…
We then used a cork borer to cut two holes in the agar 1cm apart. We then filled one hole with potassium ferricyanide. Next we filled the other hole with ferrous sulfate. We then observed the petri at an interval of 15 minutes. We observed and recorded results.
Results:
1. Yellow solution is spreading out from the hole and into the gel and clear solution.
2. The clear ferrous was not clear to see, but it conjoined with the yellow solution
3. The blue color has formed
4. Potassium solution has formed to the ferrous solution
Discussion:
As shown in the results the potassium solution spread out from the hole and into the ferrous solution. When they conjoined it formed a blue solution. This showed that diffusion occurred because it moved from a high concentration to a lower one. In this case the potassium had a higher concentration so it moved toward the ferrous solution. It would be pretty awesome to do this experiment on two different solutions, like orange juice or apple juice. We could see if they are hypertonic, hypotonic or isotonic. Since I did not get a chance to perform this lab, if I had the opportunity I would like to do the lab and see the results on my …show more content…
When the two solutions met it formed a vibrant blue color.
Work Cited
Macfoy, Cyrus. General Biology: Bi 101 Laboratory Manual. S.l.: Kendall Hunt, 2012. Print.
Exercise III.
Osmosis in a Nonliving System
Osmosis is the movement of water molecules from areas of higher water potential to regions of lower water potential across a selectively permeable membrane. Osmosis deals only with water. In this experiment we tested osmosis in a nonliving system. My prediction for this experiment is that all five of the bag will change colors after being immersed in solution. To test my prediction we tested five dialysis bag in five different solutions.
Materials:
30 presoaked 15 cm lengths of 44mm flat diameter dialysis tubing per lab
Twine
1% starch
Cyrus MacFoy
June 16,2015
Diffusion and Osmosis
Exercise I.
Molecules are always in constant movement. Molecular motion is a form of energy, the kinetic energy of molecules. The Brownian movement is the movement of small particles caused by the bombardment of the particles by millions of water molecule. This movement will continue indefinitely as long as there is water. My prediction for this lab is the solution of the water is hypertonic meaning there is a higher concentration of solutes outside of the cell. To test my prediction my lab partners conducted the Brownian movement.
Materials:
Bon Ami scouring powder, carmine red and Indian ink
Microscope slides and cover slip
Dropper bottles with distilled water
Spatulas …show more content…
We then used a cork borer to cut two holes in the agar 1cm apart. We then filled one hole with potassium ferricyanide. Next we filled the other hole with ferrous sulfate. We then observed the petri at an interval of 15 minutes. We observed and recorded results.
Results:
1. Yellow solution is spreading out from the hole and into the gel and clear solution.
2. The clear ferrous was not clear to see, but it conjoined with the yellow solution
3. The blue color has formed
4. Potassium solution has formed to the ferrous solution
Discussion:
As shown in the results the potassium solution spread out from the hole and into the ferrous solution. When they conjoined it formed a blue solution. This showed that diffusion occurred because it moved from a high concentration to a lower one. In this case the potassium had a higher concentration so it moved toward the ferrous solution. It would be pretty awesome to do this experiment on two different solutions, like orange juice or apple juice. We could see if they are hypertonic, hypotonic or isotonic. Since I did not get a chance to perform this lab, if I had the opportunity I would like to do the lab and see the results on my …show more content…
When the two solutions met it formed a vibrant blue color.
Work Cited
Macfoy, Cyrus. General Biology: Bi 101 Laboratory Manual. S.l.: Kendall Hunt, 2012. Print.
Exercise III.
Osmosis in a Nonliving System
Osmosis is the movement of water molecules from areas of higher water potential to regions of lower water potential across a selectively permeable membrane. Osmosis deals only with water. In this experiment we tested osmosis in a nonliving system. My prediction for this experiment is that all five of the bag will change colors after being immersed in solution. To test my prediction we tested five dialysis bag in five different solutions.
Materials:
30 presoaked 15 cm lengths of 44mm flat diameter dialysis tubing per lab
Twine
1% starch