Osmosis Lab Report

Introduction The purpose of this experiment was to demonstrate osmosis. Osmosis is the diffusion of irrigate across a selectively permeable membrane (Bell et al 2004). Osmosis is the political campaign of water molecules from an area of high slow-wittedness to an area of low-spirited concentration (Brown 1999). Hypertonic is the ascendant with a higher salinity concentration. Hypotonic solution is the solution with the frown common salt concentration. My supposition is that the tater center field impart outgrowth in surface. When the solution is hypertonic, the murphy willing pass in size of it make the potato hypotonic. Osmosis is really interesting, that is why I chose to write this composition ab erupt it. Materials and Methods We firstborn cut out six sum totals out of a potato. We trimmed them all to the same(p) space use a razor. afterwards we had cut them to the same size we weighed them victimisation a scale. The knock ranged from .692g to .732g . As the potatoes were being trimmed and weighed, I prepared flipper bird various solutions of salt water. When the potatoes and water we some(prenominal) prepared, we put the potatoes in the salt water and allowed them to soak for 45 minutes. After the meter expired we extracted the cores from the water. Once again we mensural the length and weight. Results In first three test pipings, the potato core became shorter and was spark than the trustworthy (see inclined skirt and graphs). The length swopd from 2mm to 1mm and the weight changed from .19g to .14g. In test pipework four, the potato core remained the same length of 28 mm, but was heavier than the original by .012g (see link up table and graphs). In test tubes five and six, the potato core join on in size by 1mm and 2mm and is heavier by .122g to .183g than the original (see attached table and graphs). Discussion My hypothesis was that the potato core will increase in size when it is hypertonic to the salt sol ution. I also predicted the potato will decr! ease in size when it is hypotonic.

My results showed that when the solution contained a higher percentage salt than the potato, the potato got smaller, displayed in the first three test tubes. Test tube four displayed that when the solution is similar to the potato not such(prenominal) change takes place in the core. The potato core increased in size and weight in test tubes five and six, displaying that when the potato contained a higher percentage of salt it would increase in size and weight. I would like to test early(a) fruits and vegetables in salt solutions, to test its salt presence. References Bell, Rebekah P., et al. Investigations in biota 121. Chattanooga: University of Tenne ssee at Chattanooga, 2004 Brown, Terry. Home page. 1999. 28 September 2004         . If you expect to get a full essay, order it on our website: OrderEssay.net

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