Potassium Chloride And The Molecules Through Semipermeable Membrane

1298 Words Mar 22nd, 2016 6 Pages
Potassium Iodide Binds to Polysaccharide Molecules through Semipermeable Membrane

Introduction:

Diffusion is defined at the net movement of molecular substances from an area of high concentration to an area of low concentration. Beyond that, diffusion can further be divided into two different kinds of net movement of substance to opposing concentration gradients, dialysis and osmosis. Dialysis is defined as the separation of small molecules from large molecules as they pass through a semipermeable membrane (Koerner, 1992).
When talking about dialysis, it is most often associated with the function or failure of the kidneys ability to process and rid the body of toxins from the blood. It would prove to be fatal if the kidneys failed to remove the roughly 1,500 liters of waste building up in the body (Nordqvist, 2015). This experiment mimics the nature of a selective plasma membrane and with time, monitors to passing of substances in and out of the barrier. The end results should appear to show a color changing chemical reaction within the more concentrated tube of 15%glucose/1%starch solution. Initially the clear and milky appearance should transform into a black and deep purple hue from the attachment of iodine to the sugar solution. The experiment has been conducted previously yielding various results. External factors affecting the rate of diffusion play a part in this experiment. Heat due to its influence on the thermodynamics of the molecular substances. Increasing…
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