Osmosis And Diffusion Lab Report
Within the lab of observing passive transport, it had been apparent that only two different types of transport had been used. Both diffusion and osmosis are involved in the movement of substances from an area of high concentration to an area of low concentration. They will both continue to happen until an equilibrium is reached, at which time there will be no net movement of substances. Diffusion does not require a membrane to occur and it involves a variety of different molecules.. Osmosis, on the other hand, involves the movement of water molecules from a region where they are in high concentration (hypotonic solution) to a region where they are in lower concentration (hypertonic solution) across a semipermeable membrane. The iodine solution …show more content…
Then it is shown how the membrane was selectively permeable when the small water and iodine molecules are able to pass through into the dialysis tubing. Once it had turned into a bluish black it was apparent that the cell membrane was selectively permeable because of the color change. The data that was recorded throughout the experiment provide further evidence of this but also overall give a clear picture of what had been completed within the lab. When the dialysis tubing color changed it was apparent that the iodine and water solution had went inside. This also was a clear indicator because the original coloring inside of the dialysis tubing was clear/white because of the starch and glucose inside of it. On the other hand the data also shows how the glucose was able to cross the semipermeable membrane into the iodine/water solution because it tested positive on the glucose test strip. This was tested by placing the glucose test strip into the water/iodine solution and the indicator was if the color changed from teal to a green-brown color. Lastly was to see if the iodine solution had changed, and it was clearly shown through the data that it was not affected, except for it leaving the cup into the dialysis tubing. The color it had originally started off with was amber, and it remained that color after the dialysis tubing was placed in the
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Semipermeable Membrane And Diffusion Lab Report
323 Words | 2 PagesIn the first experiment displaying a semipermeable membrane and diffusion, we first filled up a 500 mL beaker with 300 mL of water and added 40 drops of potassium iodide solution to the water. We slowly stirred the mixture to make sure the potassium iodide was completely even throughout the water. We then took a dialysis bag and soaked it in water for few seconds to make it easier to open up the seal. We tied up one end of the dialysis bag with a piece of string and filled the bag with 13 mL of dissolved cornstarch in water. Then we tied up the other end of the dialysis bag with a piece of string and placed the bag into potassium iodide and water solution.
Describe The Difference Between Active And Passive Transport
470 Words | 2 PagesWhen trying to move a substance across a biological membrane, a passive transport might need a little help from a membrane protein. There are several types of ways to make moving these molecules easy. They might be as easy as osmosis or diffusion.
Diffusion Of Egg Lab Report
866 Words | 4 PagesEgg Lab Conclusion Diffusion and osmosis were both seen throughout the experiment on dissolving egg shells. Diffusion is the movement of molecules from a high concentration to a low concentration while osmosis is the movement of water across a membrane. What we had done in the lab was let an egg sit in different substances per night over the course of a week to watch the movement of water across the membrane of the egg. On day one we placed the egg in vinegar and my hypothesis was if we placed the egg in vinegar then the acid will start to deteriorate the shell because of vinegar’s acidic acidic properties. This in fact happened but it was because of diffusion.
Beta Vulgaris Cell Lab Report
1061 Words | 5 PagesMore specifically the aim was to investigate what effect 40% and 70% ethanol solutions had on a B. Vulgaris cell membrane and then compare them to the same test with distilled water. It was hypothesised that the ethanol solution would increase the membrane permeability. From the results the hypothesis can be supported. Cell membranes are a core aspect of understanding cells which helps to understand humans and other living creatures. Therefore the topic of cell membranes has been extensively researched, meaning that there is no limit to information and sources of information of the subject.
Kirby Bauer Diffusion Test Lab Report
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Chloride Salts Lab Report
823 Words | 4 Pages(Lenntech, 2016). Diffusion being the process in which oxygen dissolves in water from kinetic movement, i.e. wave movement etc. (Hyperphysics, 2016). This means all water types contain some quantity of dissolved oxygen naturally when exposed to air sources. The dissolved oxygen in the samples used in this experiment would only have entered the water via atmospheric diffusion.
Water Hydration Lab Report
603 Words | 3 PagesIntroduction: In this lab, of water in a hydrate, or a substance whose crystalline structure is bound to water molecules by weak bonds, is determined by heating up a small sample of it. By heating, the water of hydration, or bound water, is removed, leaving only what is called an anhydrous compound. Based on the percent water in the hydrate, it can be classified as one of three types: BaCl2O ⋅ 2H20, with a percent water of about 14.57%, CuSO4
Describe The Differences In The Nutritional Requirements Of Microorganisms
763 Words | 4 PagesThe speed of diffusion depends upon the temperature and the concentration gradient. Diffusion of water from its higher concentration to lower concentration is called Osmosis. Water molecules can move through the permeable membrane in cell towards the concentration gradient. Due to the difference in the concentration of inside and outside we can distinguish them by terms isotonic, hypotonic and hypertonic. Microorganisms have adapted to the osmatic variation.
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).
Rate Of Diffusion Lab Report
1137 Words | 5 PagesThe Effect of the Molecular Weight of a Substance to its Rate of Diffusion Paulo E. Garcia Group 2 Sec U-7L October 16, 2014 ABSTRACT The rate of diffusion was tested by using a petri dish with agar-water gel and three drops of different solutions. These solutions were observed for thirty minutes and measured every three minutes. The different solutions used are Potassium permanganate with a molecular weight of 158 g/mole diffused the greatest distance among the three, Potassium dichromate with a molecular weight of 294 g/mole diffused the lesser than that of Potassium permanganate, and Methylene Blue with a molecular weight of 374 g/mole diffused the least distance.
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