Catalase Liver
AIM
To investigate the diffusion of glucose, starch and albumin molecules across a membrane over a period of 60 minutes.
Hypothesis
The smaller molecules such as glucose and water will diffuse through the dialysis bags membrane. This hypothesis will be tested by filling the bag with a solution consisting of 5ml each of glucose, albumin and starch, then it will be tied off. The bag is placed in a beaker of warm water and the following table of results will indicate after how many minutes tests were carried out.
Introduction.
Diffusion is the movement of molecules from a region in which they are highly concentrated to a region in which they are less concentrated. It depends on the motion of the molecules and continues until the system in which the molecules are found reaches a state of equilibrium, which means that the molecules are randomly distributed throughout the system.
An important concept in understanding diffusion is the concept of equilibrium. There are two types of equilibrium. Static equilibrium occurs when there is no action taking place. Dynamic equilibrium occurs when two opposing actions occur at the same rate.
Several factors affect how fast a molecule will diffuse. The first of these is the kinetic energy of the molecule, which is most frequently measured as the temperature of the system. Diffusion is possible at any temperature above absolute zero (-273°C). The higher the temperature the more rapid the diffusion, molecules in a system at a higher temperature will have more energy and will move faster, and therefore diffuse faster, than molecules of the same type in a lower temperature. The size of the molecule also affects how quickly it will diffuse. At the same temperature, smaller molecules will move more rapidly than larger molecules because it takes more energy to get the larger molecule moving. Other factors include any charges on...
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