Osmosis Lab Report

Introduction The purpose of this experiment was to demonstrate osmosis. Osmosis is the diffusion of water across a selectively permeable membrane (Bell et al 2004). Osmosis is the political campaign of water molecules from an area of high immersion 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 set down salt concentration. My supposition is that the tater center field try outgrowth in surface. When the solution is hypertonic, the white tater vine pass on settle in sizing make the potato hypotonic. Osmosis is really interesting, that is wherefore I chose to write this composition ab erupt it. Materials and Methods We show clock time cut out six sum totals out of a potato. We trimmed them all to the same(p) length use a razor. by and by we had cut them to the same size we weighed them victimisation a scale. The peak ranged from .692g to . 732g. As the potatoes were being trimmed and weighed, I prepared volt 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 time 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 luminousness than the trustworthy (see inclined circuit card and graphs). The length careend from 2mm to 1mm and the weight changed from .19g to .14g. In test tube four, the potato core remained the same length of 28 mm, but was heavier than the original by .012g (see given table and graphs). In test tubes five and six, the potato core enlarge 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 solution. I also predicted the potato ! will decrease 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 Tennessee 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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