Osmosis and Diffusion Essay

The basic tenets of Osmosis and distribution were tested and examined in this lab. We examined the percent subjoin of plentifulness and mebibyte of different preoccu be sickions of saccharose in the dialysis root word emerged in distilled piss supply and the potato cores emerged in meannesss of sucrose. The information reinforces the principles of Osmosis and scattering, and in a biological context, we can imitate how piss system and p holds roleplay in and come forth of our own cellular phones. IntroductionObjective1. check into the process of osmosis and diffusion in a model of a tissue layer system.2. inquire the effect of solute closeness on water potency as it relates to living whole caboodle tissue. Background InformationMolecules are in constant motion they tend to melt down from areas of high intentness, to areas of low concentration. This broad principle is divided into ii categories diffusion and osmosis. Diffusion is the random movement of mole cules from an area of high concentration to an area of lower concentration. This is considered a passive form of transportation because it does not require any additional life force to transport the molecules. In the body, carbon dioxide and oxygen can diffuse across cell membranes.Osmosis is a special type of diffusion where water moves through a selectively pervious membrane from a constituent of higher(prenominal) water likely to a region of lower water potential. In our body, water diffuses across cell membranes through osmosis. piddle potential is the measure of publish energy of water in a stem and is shown with the use of the symbol . Water potential is guessed by two factors osmotic potential () and pressure potential (p). Osmotic potential is dependent on the solute concentration, and pressure potential which is the energy that forms from action of pressure either positive or negative on a solution. The comparison to find the sum of water potential is Water ca pability = Pressure Potential + Osmotic Potentialw = p + The purpose of this lab is to observe the carnal effects of osmosis and diffusion and to determine if it real takes role. We hypothesize that, because molecules diffuse down a concentration gradient, the cud of the dialysis tubes impart increase, and we guess that as the zepity increases, the percent of diverge in mass give besides increase. HypothesisDiffusion and osmosis will communicate until dynamic equilibrium is r individu everyyed. As the sucrose concentration of the solution increases so will the mass. Materials act upon 11. 6 strips of dialysis subway system2. 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(prenominal) solution)9. Scale10. Plastic wrap11. ThermometerMethodsExercise 11. Obtain 6 strips of dialysis subway system and puff a knot in one end of each. 2. pour near 15-20ml of each of the following solutions into separate bags. 3. carry get rid of most of the air from the bag and tie the baggie.4. Rinse the baggie carefully in distilled water to stumble any sucrose that whitethorn have 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. allow 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 assign solution into a beaker. small-arm a potato into 4 touch on lengths about the shape of French heat up or tubes. 2. Determine the mass of the 4 potato cylinders together and rec ord. 3. Place the cylinders into the beaker with your assigned solutions and cover with plastic wrap. Leave overnight. 4. film the cylinders from the beakers and carefully dry them. Record the board temperature in Celsius. 5. Determine the mass of the 4 potato cylinders together and record.From these results, it can be concluded that the hypothesis is justified and correct. The info shows that the mass increased as the concentration of the sucrose solution increased. Osmosis is clearly beingness replicated in the physical form. Analysis variegate in mass depends on the concentration of sucrose within the dialysis bags. If the concentration of sucrose is greater intimate the bag than outside, whence 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 outright proportional. As the mass increases, so does the molarity. These are inversely proportional because whenever the s ucrose molarity inside the bag is more concentrated, it will become more dilute and vise versa. The solutions will fulfill equilibrium someplace between the two concentrations.The hypothesis is certain based on the data that was obtained because as the sucrose concentration increased so did the final mass of the solutions. One feasible line of error could be the dumbness of the string that tied off the dialysis tubing. If on that point was a leak or a break in the dialysis tubing, all of the data would be off. Another possible source of error could be that the students did not pat dry the potato sample salutary enough causing drops to be odd on the electronic balance, tarring it incorrectly, causing all other data to be off slightly. Simple mathematical errors always occur, so there is always room for undecomposable algebraic mistakes in this section of the lab. evidenceThe purpose of this lab was to describe the physical mechanism of osmosis and diffusion and describe h ow molar concentration affects diffusion. We have now notice 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 support our conclusion.Exercise 1 prove that water moves across the selectively permeable membrane of the dialysis tubing much easier than sucrose sugar does. The water moved to reach equilibrium between the solutions. Sucrose moldiness 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 callable 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 Biology Place. Prentice lobby Bridge Page. Pearson Education, June 2007. Web. 12 Sept.2011. Moulton, Glen E. Cell Theory, Form, and hightail it Fluid Mosaic Model of membrane Structure and Function Infoplease.com. Infoplease Encyclopedia, Almanac, Atlas, Biographies, Dictionary, Thesaurus. Free Online Reference, research & Homework Help. Infoplease.com. Web. 14 Sept. 2011. < http//www.infoplease.com/cig/ biological science/fluid-mosaic Bowen, R. (2000, July 2). Osmosis. Retrieved February 14, 2009, from http//www.vivo.colostate.edu/hbooks/cmb/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.). vernal York Pear son Education Inc.