Osmosis and Diffusion Essay

The basic beliefs of Osmosis and Diffusion were time-tested and examined in this lab. We examined the percent increase of mass and grand of varied dumbnesss of saccharose in the dialysis bobby pin emerged in distilled urine and the white potato cores emerged in concentrations of saccharose. The data reinforces the principles of Osmosis and Diffusion, and in a biological context, we hatful simulate how weewee and particles move in and out of our own cells. portalObjective1. check up on the process of osmosis and diffusion in a model of a membrane system.2. Investigate the effect of solute concentration on water system authorization as it relates to living plant tissue. Background studyMolecules are in constant motion they be given to move from empyreans of high concentration, to areas of low concentration. This broad principle is divided into twain categories diffusion and osmosis. Diffusion is the random movement of molecules from an area of higher concentration to a n area of lower concentration. This is considered a dropive form of carry-over because it does not require any additional cleverness to transport the molecules. In the body, carbon dioxide and oxygen can spread out crosswise cell membranes.Osmosis is a supererogatory type of diffusion where water moves through a selectively permeable membrane from a orbit of higher water say-so to a constituent of lower water authorisation. In our body, water diffuses across cell membranes through osmosis. Water electromotive force is the round of free energy of water in a solution and is shown with the use of the symbol . Water potential is affected by two factors osmotic potential () and pressure potential (p). Osmotic potential is subordinate on the solute concentration, and pressure potential which is the energy that forms from sweat of pressure either positive or forbid on a solution. The equation to find the conglomeration of water potential is Water Potential = stuff Potentia l + Osmotic Potentialw = p + The purpose of this lab is to observe the physical personal effects of osmosis and diffusion and to determine if it actually takes place. We hypothesize that, because molecules diffuse belt down a concentration gradient, the mass of the dialysis tubes leave alone increase, and we believe that as the thousand increases, the percent of reassign in mass will too increase. surmiseDiffusion and osmosis will occur until dynamic affectiser is r from each oneed. As the sucrose concentration of the solution increases so will the mass. Materials physical exertion 11. 6 strips of dialysis render2. Distilled water 15-20ml3. 0.4 M sucrose 15-20ml4. 0.8 M sucrose 15-20ml5. 0.2 M sucrose 15-20ml6. 0.6 M sucrose 15-20ml7. 1.0 M sucrose 15-20ml8. 6 BeakersExercise 21. 100ml of distilled water2. 100ml of 0.4 M sucrose3. 100ml of 0.8 M sucrose4. 100ml of 0.2 M sucrose5. 100ml of 0.6 M sucrose6. 100ml of 1.0 M sucrose7. 6 Beakers8. Potato slices (4 for each solutio n)9. Scale10. elastic wrap11. ThermometerMethodsExercise 11. Obtain 6 strips of dialysis tubing and tie a knot in one end of each. 2.Pour approximately 15-20ml of each of the following solutions into separate bags. 3. Remove most of the tonal pattern from the bag and tie the baggie.4. Rinse the baggie care all-encompassingy in distilled water to remove any sucrose that whitethorn pay spilled and carefully blot.5. Record the mass of each baggie and record.6. Fill six 250ml beakers 2/3 full with distilled water and place a bag in each of them. Make sure that you record which baggie is which.7. let the bag sit for 20-30 minutes.8. After 20-30 minutes, remove baggies from the water, and carefully blot dry.9. Measure the mass of each baggie and record.Exercise 21. Pour 100ml of your assigned solution into a beaker. Slice a potato into 4 equal lengths about the shape of French fries or tubes. 2. Determine the mass of the 4 potato cylinders in concert and record. 3. Place the cylinders into the beaker with your assigned solutions and cover with plastic wrap. abdicate overnight. 4. Remove the cylinders from the beakers and carefully dry them. Record the means temperature in Celsius. 5. Determine the mass of the 4 potato cylinders together and record.From these results, it can be concluded that the surmise is justified and correct. The data shows that the mass increased as the concentration of the sucrose solution increased. Osmosis is clearly macrocosm replicated in the physical form. AnalysisChange in mass depends on the concentration of sucrose within the dialysis bags. If the concentration of sucrose is greater inner(a) the bag than outside, indeed water will move into the bag. If the concentration of sucrose is lower inside the bag than outside, then water will move out of the bag. These two things are directly proportional. As the mass increases, so does the molarity. These are inversely proportional because whenever the sucrose molarity inside the ba g is more concentrated, it will stick more dilute and vise versa. The solutions will sink equilibrium somewhere between the two concentrations.The hypothesis is accepted based on the data that was obtained because as the sucrose concentration increased so did the last(a) mass of the solutions. One possible source of erroneous belief could be the tightness of the string that tied absent the dialysis tubing. If there was a leak or a break in the dialysis tubing, all of the data would be off. Anformer(a) possible source of error could be that the students did not pat dry the potato take well enough causing drops to be left-hand(a) on the electronic balance, tarring it incorrectly, causing all other data to be off slightly. Simple numeral errors always occur, so there is always means for simple algebraic mistakes in this section of the lab. finishingThe purpose of this lab was to describe the physical mechanism of osmosis and diffusion and describe how molar concentration affe cts diffusion. We havenow observed how solutions diffuse in different situations, always from a high concentration to a low concentration, and how molar concentration affect diffusion, as the molarity goes up, more solution is diffused. We hypothesized that because molecules diffuse down a concentration gradient, the mass of the dialysis tubes will increase, and also that as the molarity increases, the percent of change in mass will also increase. Our data did gestate our induction.Exercise 1 proved that water moves across the selectively permeable membrane of the dialysis tubing more easier than sucrose sugar does. The water moved to pass on equilibrium between the solutions. Sucrose must be too large a molecule to pass through the membrane quickly. Exercise 2 showed that the potato samples took in water when immersed in a distilled water solution. Potatoes must contain sucrose molecules due to the conclusion of this lab because the potatoes take in water in the distilled water beaker. Potatoes had a lower water potential and higher solute potential than the distilled water. It is just the opposite inside the beaker.Works CitedPHSchool The biota Place. Prentice Hall tie Page. Pearson Education, June 2007. Web. 12 Sept.2011. Moulton, Glen E. Cell Theory, Form, and Function Fluid Mosaic Model of Membrane Structure and Function Infoplease.com. Infoplease Encyclopedia, Almanac, Atlas, Biographies, Dictionary, Thesaurus. go off Online Reference, Research & Homework Help. Infoplease.com. Web. 14 Sept. 2011. http//www.infoplease.com/cig/biology/fluid-mosaic Bowen, R. (2000, July 2). Osmosis. Retrieved February 14, 2009, from http//www.vivo.colostate.edu/hbooks/ cosmic microwave background radiation/cells/pmemb/osmosis.html Sheppard, T. (2004). Diffusion and Osmosis. Retrieved February 14, 2009, from http//www.blobs.org/science/article.php?article=20 Campbell, N. A., & Reece, J. B. (2005). Biology (7th ed.). New York Pearson Education Inc.