Diffusion And The Concentration Of Diffusion

1103 Words Mar 25th, 2016 5 Pages
Introduction: The lab used many concepts such as; diffusion is the passive movement of molecules or particles along a concentration gradient, or from regions of higher to regions of lower concentration (Biology-Online, n.d). The concentration gradient is a gradual change in the concentration of solutes in a solution as a function of distance through a solution (Biology-Online, n.d). Diffusion is a form of passive transport and requires no energy to be completed. Passive transport is The movement of a chemical substance across a cell membrane without expenditure of energy by the cell, as in diffusion (The Free Dictionary, n.d). Osmosis is a form of diffusion. Osmosis is the tendency of a fluid, usually water, to pass through a …show more content…
This is all a part of a cell’s osmoregulation. Osmoregulation means the physiological processes that an organism uses to maintain water balance; that is, to compensate for water loss, avoid excess water gain, and maintain the proper osmotic concentration (Biology Encyclopedia, n.d) The purpose of this experiment is to observe how tonicity of a solution effects effects a cell. An egg will be used to represent a cell, corn syrup as the hypertonic solution, and water as the hypotonic solution. My hypothesis is that if you place an egg in corn syrup it will decrease in volume, and when placed in water, it will increase, this is because of osmosis and how diffusion works. First, The egg will be placed in vinegar for two days to expose a semipermeable membrane. All changes will be recorded. Next, egg will then be placed in corn syrup for twenty four hours, and all changes will be recorded. Finally the egg will be placed in water for twenty four hours and any changes will be recorded

Materials and Methods: The following materials will be needed per egg: an egg, 1 beaker 250mL, 1 graduated cylinder, 150mL vinegar, 150mL corn syrup, 150mL distilled water, plastic wrap, rubber band. The procedure is as follows:
Fill a graduated cylinder to 150mL with vinegar
Pour into beaker
Place egg into beaker with the vinegar
Leave
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