The document discusses membrane filtration, which is a method of separating particles or molecules from a liquid or gas stream using a semi-permeable membrane. Membrane filtration includes microfiltration, ultrafiltration, nanofiltration, and reverse osmosis. It is commonly used in water treatment, food processing, and medical applications.
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The aim of this experiment is to observe and record the rate of the blue water in the dialysis tube diffusing into the beaker containing different concentrations of salt over 20 minutes to see what effect the concentrations of salt has on the rate of diffusion. The hypothesized of this experiment is that the blue water in dialysis tube 3 will have a faster rate of blue dye diffusing into the salt water in beaker 3. Beaker 1 will have the slowest rate of blue dye diffusing from the dialysis tube into the salt water and beaker 2 will result in a colour in-between beaker 1 and 3. This is because the concentration of salt in the beaker is higher than the water in the dialysis tubes so the salt water will go into the dialysis tube while the blue water in the dialysis tube will diffusion into the beaker. This experiment was performed by measuring out the same amount of water into each of the 3 beakers and adding different amounts of salt to each one to change the concentration. 3 dialysis tubes containing water and 3 drops of blue dye were tied at one end, then tied at the other using cotton thread before placing them one each into the different concentrated beaker cotton tied end facing down. After 20 minutes the results were observed and recorded into the results table. The finishing results were unexpected and not accurate due to the systematic and random errors, rejecting the hypothesis.
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