Diffusion Lab Report
Respiratory System Diffusion Lab 1. Describe the changes that occurred to the salt and to the potato Numerous changes occurred to the salt and potato from the start to end of the experiment. At the starting of the experiment, the mass of the potato was 16.4 grams; while at the end the mass decreased, by 1.4 grams, to give a mass of 15.0 grams. Also, at the starting, the salt was completely white and was completely dry, at the end though the salt became wet, soggy and changed in color to yellow. Lastly, the salt on the potato spread out and not a lot of salt was found on the potato compared to the start of the experiment. 2. Explain what process caused the results. Be certain to back up your response with at least three pieces of evidence. One piece of evidence must be quantitative. Explain how the process worked in this lab …show more content…
In the process of diffusion, the molecules move from an area of low concentration to an area of high concentration. The process worked as the concentration of salt was higher compared to the concentration of the cells in the potato which was lower. The skin of the potato acted like a semi-permeable membrane. As there was some water content in the cells of the potato, to achieve equilibrium with the salt, the water had to be absorbed by the salt through the process of osmosis. As a result, one qualitative observation at the end of the lab was that there was a lot of water content outside of the potato compared to the start when the petri-dish was completely dry. Also, when equilibrium was achieved the water content of the potato decreased causing the mass of the potato to decrease by 1.4 grams from the start of the experiment. The last piece of evidence that shows diffusion occurred was that the salt had become more wet and soggy, this showed how the water in the potato’s cells had come out when finding the stage of
Mitochondrial Activity Lab Report
2102 Words | 9 PagesFirst, it was hypothesized that test tube "A", the control, would not show any red concentration, test tube "B" which contains supernatant II would show the most red concentration and test tube "C" which contains sediment II would only show a little red concentration. The second hypothesis states that the raw corn kernels would have mitochondrial activity while the boiled corn kernels would not. The last hypothesis interprets that the "gunk" and sediment I will both contain starch granules. It was only expected to find mitochondrial activity in Supernatant II. Unfortunately, after performing this experiment, we were not able to support this hypothesis and come up with a conclusion.
Rhubarb Osmosis Lab Report
1127 Words | 5 PagesAdditionally, it was difficult obtaining a piece of rhubarb that was thin and particularly red, therefore the effect could not be best observed in the cells. Part B: Design your own experiment Parts of this practical were taken and slightly altered from the following link http://www.markedbyteachers.com/gcse/science/investigate-the-effect-of-surface-area-on-osmosis-in-potato-tissue.html Aim: To observe the effect different surface area: volume ratios have on osmosis in potato tissue. Hypothesis: If the potato has a larger surface area: volume ratio, the quicker osmosis will take place and the larger the mass will be at the end of the experiment, therefore the difference in mass of the potatoes from the start of the experiment to the end of the experiment will be larger. Additionally, the potato pieces left in a saltwater solution will decrease in mass, whereas the pieces left in water will increase in mass.
Essay On The Effect Of Temperature On Osmosis
1159 Words | 5 PagesFor this lab I will be using water and sucrose to demonstrate the rate of osmosis. In this lab I will be exploring how temperature impacts the rate of osmosis by placing pieces of potato of equal size in solutions of different temperatures and observing the change in mass of potato after a given period of time. The change in mass will indicate the rate of osmosis.
Lab Report: Diffusion And Osmosis
1274 Words | 6 PagesWe zeroed out the scale and weighed all four potato cores at once and recorded the mass. We then put those potato cores into the beaker of 75 mL of solution. With the potato cores in the beaker we then put a watch glass over the top of the beaker to minimize the amount of solution that evaporates. We let the potato cores sit in the solution overnight. The next day we then emptied the beaker of the solution by carefully draining the solution, while not letting the potato cores fall out.
Effect Of Surface Area To Volume Ratio On The Rate Of Diffusion
1015 Words | 5 PagesIn this practical agar jelly cubes will be used to represent a cell. AIM: To model diffusion in a practical form and investigate the effect of surface area to volume ratio. HYPOTHESIS: It is hypothesised the smaller the cube the quicker and bigger the rate of diffusion will be and with a larger cube there will be a smaller percentage of diffusion due to its bigger volume.
Empirical Formula Of Copper Chloride Lab Report
729 Words | 3 PagesThe dissolution of the salt could be reversed by evaporating the water as shown in part one of the experiment, just as evaporating the water could be reversed by adding water as demonstrated in part two of the
Kirby Bauer Diffusion Test Lab Report
624 Words | 3 PagesINTRODUCTION: In this experiment I was testing for antimicrobial sensitivity of Staphylococcus epidermidis by using the Kirby-Bauer Diffusion test. The three antibiotics utilized in this lab were: gentamicin, novobiocin, and penicillin. I determined the effectiveness of the antibiotic by observing and measuring the zone of inhibition for each antibiotic.
Diffusion And Osmosis Lab Report
819 Words | 4 PagesDiffusion and Osmosis Lab Report By: Jettica Williams BIOL 1107 Lab September 21, 2016 Prepared for Mrs. Fulford Lab Course Page Break The cell membrane act as a roadblock for cells. The cell membrane has a very hectic job. It restricts the access to what comes in and what goes out. The bond the membrane shares with others is the idea of accountability.
Osmosis In A Potato Cell
1598 Words | 7 PagesBy using the same mass of potato slices and putting them in different concentration of solutions for a specific amount of time will tell us how the concentration changes the mass of the potato slice. Therefore changing the rate of osmosis. Hypothesis: I predict that, if the piece of potato was put into a solution that has a high concretion of sucrose then the potato slice would lose mass as it would lose water from its cells because the water is moving out of the cell from a high concentration to a low concentration of water through a semi- permeable membrane. The cell is hypotonic and the solution is hypertonic.
6.03 Chemistry Lab
289 Words | 2 PagesAnother five tea bags were soaked for fifteen seconds in beaker B and then removed. The same teabags were then placed into beaker C for two minutes. They were removed after the time elapsed. 4. The solutions were allowed to cool to room temperature using an ice bath.
Osmosis Experiment Essay
1605 Words | 7 PagesThe hypothesis we came up with for this project was that in the distilled water there wouldn't be no change in the potato, we wouldn’t see a gain or loss with the water sitting in the beaker. The beaker with the 30% Sucrose and Distilled water we predicted that there was going to be weight gain to the potato. And for the distilled water with the 30% sucrose and we predicted weight loss. But the results came out to be the first bag content being isotonic the second bag came out to be hypotonic and lastly the result came out to be
Water Hydration Lab Report
603 Words | 3 PagesIn this experiment, the amount of water lost in the 0.99 gram sample of hydrated salt was 0.35 grams, meaning that 35.4% of the salt’s mass was water. The unknown salt’s percent water is closest to that of Copper (II) Sulfate Pentahydrate, or CuSO4 ⋅ 5H2O. The percent error from the accepted percent water in CuSO4 ⋅ 5H2O is 1.67%, since the calculated value came out to be 0.6 less than the accepted value of 36.0%.This lab may have had some issues or sources of error, including the possibility of insufficient heating, meaning that some water may not have evaporated, that the scale was uncalibrated, or that the evaporating dish was still hot while being measured. This would have resulted in convection currents pushing up on the plate and making it seem lighter by lifting it up
Potato Osmosis Lab Report
1078 Words | 5 PagesBiology Design Practical Joshua Edwards What are effects of the volume of a potato and the amount of weight it loses when placed in salt solution? Introduction This design practical uses a potato’s surface area to volume ratio to see what affects it has on osmosis in different concentrations. Osmosis is the movement of water molecules through a cell membrane into an area of a higher solute concentration. The movement goes the way of the solvent with more solute because the lower solute concentration is drifting through balancing the ratio of solute per solvent (En.wikipedia.org, 2018).
Lab Experiment: Osmosis Visking Tube Lab
830 Words | 4 PagesTherefore, this experimentation indicated that the sucrose molecules cannot diffuse from the concentration of the dilute solution, while on the other hand the water molecules diffuse from the dilute solution to the concentrated one. Hypothesis: If the (independent variable) sucrose of the dilute solution is
Diffusion Lab Report
1016 Words | 5 PagesHYPOTHESIS: Once the dye hits the water, the dye molecules will move faster and uniformly dispersing in the hottest water first. PURPOSE: The purpose of this experiment is to improve my ability to observe an experiment. In addition, it will help aid me in making proper observations while also drawing conclusions in Kinetic Molecular Theory. RAW MATERIALS:
More about Diffusion Lab Report
Mitochondrial Activity Lab Report
2102 Words | 9 PagesRhubarb Osmosis Lab Report
1127 Words | 5 PagesEssay On The Effect Of Temperature On Osmosis
1159 Words | 5 PagesLab Report: Diffusion And Osmosis
1274 Words | 6 PagesEffect Of Surface Area To Volume Ratio On The Rate Of Diffusion
1015 Words | 5 PagesEmpirical Formula Of Copper Chloride Lab Report
729 Words | 3 PagesKirby Bauer Diffusion Test Lab Report
624 Words | 3 PagesDiffusion And Osmosis Lab Report
819 Words | 4 PagesOsmosis In A Potato Cell
1598 Words | 7 Pages6.03 Chemistry Lab
289 Words | 2 PagesOsmosis Experiment Essay
1605 Words | 7 PagesWater Hydration Lab Report
603 Words | 3 PagesPotato Osmosis Lab Report
1078 Words | 5 PagesLab Experiment: Osmosis Visking Tube Lab
830 Words | 4 PagesDiffusion Lab Report
1016 Words | 5 Pages