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hi frank, i just need you to rewrite the report in your or my own words. This isnt mine. cant copy word from word.
Queenasia moore 2/26/2022 Microbiology 150 Professor: Dr.O
Osmosis and Diffusion
Introduction : In this lab we will discuss the effects of salt water in or around potatoes with hypotonic, hypertonic and isotonic solutions. Diffusion is the movement of molecules through a semipermeable membrane from high concentration to low. Osmosis is the movement of water molecules from a solution with low concentration to high concentration. Both help organisms stabilize their environment on an intracellular level.
Biodata: Miltiana Holdip (Nursing Student at AMG School of Practical Nursing)
Aims and Objective: To measure osmosis and diffusion in potatoes in isotonic, hypertonic and hypotonic concentrations of water.
Materials:
Methods:
● 3 disposable bowls
● 2 medium sized potato
● 2 plastic spoons
● 1 plastic knife
● 2 wooden sticks
● Water (hot and cold)
● Food coloring
● Marker
1) Peel one of the potatoes using the knife, taking off all the skin and discarding in the trash
2) Use the knife to shave away one end of the potato to create a flat end. The end should be
flat enough for the potato to stand up on a flat surface.
3) On the other end of the potato use the knife to scoop until the area can hold liquids like a cup
4) Rinse the potato to remove any further debris
5) Take one of the plastic bowls and add water, then place the potato in the center with the
flat service resting inside the bowl
6) Add water in the “cup like” area of the potato that’s facing towards the ceiling
7) Next, we are going to take the second potato and cut it in cubes
8) Place the remaining two bowls on the table
9) The first bowl will be labeled “X” and the second bowl will be labeled “Y”
10) The bowl labeled “X” will be filled with cold water to the brim
11) The bowl labeled “Y” will be filled with boiling water to the brim
12) Then you will take your food coloring and administer 4 drops in each bowl
13) Take all 3 bowls and place aside in an area where the experiment will not be interrupted 14) Check back in 18-24hrs to document results of the experiment
Discussions:
Group A: For the first experiment, this group added water to the middle of their potato and water surrounding it to create an isotonic solution to see if there would be a net change in water molecules.
For the second experiment, they used black food coloring in both “X” and “Y” bowls to see if the temperature in each bowl will increase the rate of diffusion.
Group B: For the first experiment, this group added two spoons of salt into the bowl’s solution only. Then add water into the middle of the potato. Their bowl became hypertonic compared to the solution inside the potato which was hypotonic.
For the second experiment, they used red food coloring for both “X” and “Y” bowls to see if diffusion will occur.
Group C: For the first experiment, this group added two spoons of salt into the potato and filled their bowl halfway with water. This created a hypotonic bowl and a hypertonic potato.
For the second experiment, they used blue food coloring for both “X” and “Y” bowls to see if diffusion will occur.
Findings:
Group A: For the first experiment, the group had an isotonic solution inside the potato and surrounding. Therefore there was no net change in molecules.
For the second experiment, the bowl labeled “Y” showed a difference as heat increases the rate of diffusion.
Group B: For the first experiment, this group potato showed a slight change. The hypertonic solution from the bowl started to diffuse through the potato to a lower concentration of solution
For the second experiment, they experienced little to no change in the rate of diffusion with bowls “X” and “Y”
Group C: For the first experiment, this group showed a slight change. The hypotonic solution of the bowl started to become engulfed by the hypertonic solution from the potato as water diffused through.
For the second experiment, they also experienced a slight change in their bowl labeled “Y” as the heat increased the rate of diffusion.
Conclusion:
To conclude, we can see that the increase in temperature causes more pressure which increases the rate of diffusion. That was demonstrated through Group A-C experiments with bowls “X” and “Y” with cold and hot water. The hot water showed a significant increase in diffusion compared to the cold. During the last step of the osmosis experiment you noticed that the hypertonic environment was increasing osmosis pressure to diffuse to a hypotonic area. This is due to the fact that the potato or bowl had a high concentration of solvent in comparison to its counterpart.
This experiment is important because saline bags are commonly used as a nurse in different health care settings. Initially saline bags contain an isotonic solution. When inserted into a patient there would be no rate of diffusion because there is similar concentration of solvents in the patients blood and in the saline bag. However, if the saline bag was hypertonic then the solvents would diffuse into the patients cell leading to swelling and the cell bursting. On the other hand if the saline bag was hypotonic then the solvents from the patient’s blood would leave the cell and the cell would shrivel up.
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